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.
UK:/ˈθiːtə/
Canada, US:/ˈθeɪtə/
Canada, US:[ˈθeɪɾə]
Canada, US:/ˈθitə/
California:Recorded audio is listed in the source snapshot.
Australian, New-Zealand:/ˈθæɪtə/
Australian, New-Zealand:[ˈθæɪɾə]
Hong-Kong:/ˈθeɪ.ta/
Hong-Kong:[fei̯˥ thaː˩]
rhymes with -iːtə
rhymes with -eɪtə
US:Recorded audio is listed in the source snapshot.
CMU ARPABET:TH EY1 T AH0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
The measure of an angle.
Definition source: English Wiktionary via Wiktextract
Topics: mathematics, sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
Pitch angle; the angle between an aircraft's longitudinal axis and the horizontal plane.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: deck angle
Antonyms: none provided
4
noun
Meaning 4
The sensitivity of the value of a derivative with respect to time; the "time decay".
Definition source: English Wiktionary via Wiktextract
Topics: business, finance
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
noun
Meaning 5
Designating a level of brain activity as measured by electroencephalography having a frequency of between four and seven cycles per second (associated with drowsiness in adults).
Definition source: English Wiktionary via Wiktextract
Topics: biology, natural-sciences
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
noun
Meaning 6
The voiceless dental fricative represented by θ.
Definition source: English Wiktionary via Wiktextract