theta

noun

1. the eighth letter of the Greek alphabet (Θ, θ).
2. the consonant sound represented by this letter.

noun

1. the eighth letter of the Greek alphabet (Θ, θ), a consonant, transliterated as th
2. the lower-case form of this letter used in phonetic transcription to represent the voiceless dental fricative th as in thick, bothCompare edh

n.eighth letter of the Greek alphabet; in ancient Greece, written on ballots to indicate a vote for a sentence of “death” (thanatos), hence occasional allusive use for “death.” n.

1. The eighth letter of the Greek alphabet.