noun · 4 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
Received-Pronunciation:/ˌɛpɪfəˈnɒmɪnən/
Received-Pronunciation:/-fɪ-/
Southern-England:Recorded audio is listed in the source snapshot.
General-American:/ˌɛpəfəˈnɑməˌnɑn/
General-American:/-nən/
Received-Pronunciation:/ˌɛpɪfəˈnɒmɪnə/
General-American:/ˌɛpəfəˈnɑmənə/
1
noun
Meaning 1
An activity, process, or state that is the result of another; a by-product, a consequence.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: by-product, unintended consequence, side effect
Antonyms: none provided
2
noun
Meaning 2
A mental process or state that is an incidental by-product of physiological events in the brain or nervous system.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
A symptom that develops during the course of a disease that is not connected to the disease.
Definition source: English Wiktionary via Wiktextract
Topics: medicine, pathology, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
a secondary phenomenon that is a by-product of another phenomenon
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: by-product, byproduct
History
Etymology
PIE word *h1epi Etymology tree Proto-Indo-European *h1ep-der. Proto-Indo-European *h1épsder. Proto-Indo-European *h1epi Proto-Hellenic *epí Ancient Greek ἐπί (epí) Ancient Greek ἐπῐ- (epĭ-)der. English epi- Proto-Indo-European *bheh2-der. Proto-Hellenic *pháňňō Ancient Greek φαίνω (phaínō) Ancient Greek φαινόμενον (phainómenon)bor. Late Latin phaenomenonder. English phenomenon English epiphenomenon From epi- (prefix meaning ‘above, on, over; in addition to’) + phenomenon. Phenomenon is derived from Late Latin phaenomenon (“appearance”), from Ancient Greek φαινόμενον (phainómenon, “thing that appears in one’s view; appearance; phenomenon”), a noun use of the neuter singular form of φαινόμενος (phainómenos), the present middle or passive participle of φαίνω (phaínō, “to cause to appear; to reveal, show, uncover; to expound”), ultimately from Proto-Indo-European *bheh2- (“to glow with light, to shine”).
Across languages
Translations
45 source translations are retained for this English entry.
Chinese Mandarin:
附帶現象 /附带现象
(fùdàixiànxiàng)
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Chinese Mandarin:
副現象 /副现象
(fùxiànxiàng)
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Chinese Mandarin:
偶發現象 /偶发现象
(ǒufāxiànxiàng)
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Dutch:
epifenomeen
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Dutch:
afgeleid gegeven
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Finnish:
sivutuote
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
French:
épiphénomène
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Greek:
επιφαινόμενο
(epifainómeno)
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Icelandic:
fylgifyrirbæri
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Northern Kurdish:
berkarîgerî
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Northern Kurdish:
bertesîrî
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Polish:
epifenomen
— activity, process, or state, process or other activity that is the result of another — see also by-product, consequence
Basque:
epifenomeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Catalan:
epifenomen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Chinese Mandarin:
附帶現象 /附带现象
(fùdàixiànxiàng)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Czech:
epifenomén
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Dutch:
epifenomeen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Dutch:
bijverschijnsel
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Esperanto:
epifenomeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Estonian:
epifenomen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Estonian:
kaasnähtus
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Finnish:
epifenomeeni
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Finnish:
seurannaisilmiö
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
French:
épiphénomène
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
German:
Epiphänomen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
German:
Begleiterscheinung
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Greek:
επιφαινόμενο
(epifainómeno)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Icelandic:
aukageta
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Icelandic:
fylgifyrirbæri
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Italian:
epifenomeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Kazakh:
эпифеномен
(épifenomen)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Kyrgyz:
эпифеномен
(epifenomen)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Polish:
epifenomen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Portuguese:
epifenómeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Portuguese:
epifenômeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Russian:
эпифеномен
(epifenomen)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Slovak:
epifenomén
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Spanish:
epifenómeno
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Swedish:
epifenomen
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Ukrainian:
епіфено́мен
(epifenómen)
— metal process or state that is an incidental by-product of physiological events in the brain or nervous system
Dutch:
epiphenomena
— symptom that develops during the course of a disease that is not connected to the disease
French:
épiphénomène
— symptom that develops during the course of a disease that is not connected to the disease
Greek:
επιφαινόμενο
(epifainómeno)
— symptom that develops during the course of a disease that is not connected to the disease
Icelandic:
fylgifyrirbæri
— symptom that develops during the course of a disease that is not connected to the disease
Polish:
epifenomen
— symptom that develops during the course of a disease that is not connected to the disease