adj · 6 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
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/fæsˈtɪdi.əs/
/fəsˈtɪdi.əs/
US:Recorded audio is listed in the source snapshot.
Australia:Recorded audio is listed in the source snapshot.
rhymes with -ɪdiəs
CMU ARPABET:F AE0 S T IH1 D IY0 AH0 S
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Excessively particular, demanding, or fussy about details, especially about tidiness and cleanliness.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
adj
Meaning 3
Difficult to please; quick to find fault.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
adj
Meaning 4
Having precise requirements for nutrition and environment (chemical and physical); especially, being difficult to culture because of those requirements.
Definition source: English Wiktionary via Wiktextract
Topics: biology, microbiology, natural-sciences
Examples
fastidious organism
fastidious species
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
adjective
Meaning 5
giving careful attention to detail; hard to please; excessively concerned with cleanliness
Definition source: Princeton WordNet 3.0
Examples
a fastidious and incisive intellect
fastidious about personal cleanliness
Meaning relationships
Synonyms: none provided
Antonyms: unfastidious
6
adjective
Meaning 6
having complicated nutritional requirements; especially growing only in special artificial cultures
Definition source: Princeton WordNet 3.0
Examples
fastidious microorganisms
certain highly specialized xerophytes are extremely exacting in their requirements
Meaning relationships
Synonyms: exacting
Antonyms: unfastidious
History
Etymology
Borrowed from Latin fastīdiōsus (“passive: that feels disgust, disdainful, scornful, fastidious; active: that causes disgust, disgusting, loathsome”), from fastīdium (“a loathing, aversion, disgust, niceness of taste, daintiness, etc.”), perhaps for *fastutidium, from fastus (“disdain, haughtiness, arrogance, disgust”) + taedium (“disgust”). Cf. French fastidieux.
Across languages
Translations
143 source translations are retained for this English entry.