Real Dictionary

E.T.A. in American English
abbreviation: estimated time of arrival

ETA in American English
estimated time of arrival
the seventh letter of the Greek alphabet (Η, η): in English transliteration, as in the etymologies of this dictionary, it is shown as ē
noun: the seventh letter of the Greek alphabet (H, η)

eta in British English 1
abbreviation for: estimated time of arrival
noun: the seventh letter in the Greek alphabet (Η, η), a long vowel sound, transliterated as e or ē

eta in British English 2
noun: (in Japan, formerly) a member of a class of outcasts who did menial and dirty tasks
noun acronym for: Euskadi ta Askatsuna: an organization of militant Basque nationalists that attempted to gain independence for the Basques, esp those ruled by Spain, by means of guerrilla warfare; active from 1959 to 2018