adj · noun · 8 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.
Canada, UK, US:/ˌɪnfɹəˈɹɛd/
Southern-England:Recorded audio is listed in the source snapshot.
Australian:/ˌɪnfɹəˈɹed/
South-Asia:/ɪn.fɾɑ.ɾĕɖ/
CMU ARPABET:IH2 N F R ER0 EH1 D
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
adj
Meaning 1
Having a wavelength in the infrared spectrum.
Definition source: English Wiktionary via Wiktextract
Usage: not-comparable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Narrower terms: mid-infrared, near-infrared
2
adj
Meaning 2
Relating to very low energies or very large distances or time spans.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: ultraviolet
3
noun
Meaning 3
The electromagnetic radiation of a wavelength longer than visible light, but shorter than microwave radiation, having a wavelength between 700 nm and 1 mm.
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: electromagnetic radiation
4
noun
Meaning 4
A specific wavelength in this range.
Definition source: English Wiktionary via Wiktextract
Usage: countable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
A device that emits infrared radiation.
Definition source: English Wiktionary via Wiktextract
Usage: countable
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
adjective satellite
Meaning 6
having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
Definition source: Princeton WordNet 3.0
Examples
infrared radiation
infrared photography
Meaning relationships
Synonyms: none provided
Antonyms: none provided
7
noun
Meaning 7
the infrared region of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
Definition source: Princeton WordNet 3.0
Examples
they could sense radiation in the infrared
Meaning relationships
Synonyms: infrared frequency
Antonyms: none provided
Broader terms: frequency, frequence, oftenness
8
noun
Meaning 8
electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.