(nonstandard) Pronunciation spelling of that, representing dialectal English.

The eighth letter of the Modern Greek alphabet, ninth in Old Greek: Θ, θ. / (mathematics) The measure of an angle.

(Scientology) A soul, spirit or being.

(Greek mythology) One of the Nereids; the mother of Achilles / (astronomy) 17 Thetis, one of the main belt asteroids.

A type of electrical activity in the brain: brain waves with a frequency of 4-8 hertz.

A type of electrical activity in the brain; a brain wave with a frequency of 4-8 hertz.

plural of theta

(prosody) of or pertaining to a thesis / dogmatic

(US, colloquial) A member of the Kappa Alpha Theta sorority.

plural of thetan