Definition: Tathagata:

Literally, "one who has become authentic (tatha-agata)," an epithet used in ancient India for a person who has attained the highest religious goal. In Buddhism, it usually denotes the Buddha, although occasionally it also denotes any of his arahant disciples.
here-and-now.org/wings.book/glossary.html

Usually translated as "Thus Come One." He who came as did all Buddhas, who took the absolute way of cause and effect, and attained to perfect wisdom; one of the highest titles of a Buddha (Charles Luk).
www.sinc.sunysb.edu/Clubs/buddhism/glossary.html

(Pali, Sanskrit; Chinese, ju-lai; Japanese, nyorai; Korean, yotae: usually left untranslated; if translated, then as 'Thus-gone', or 'Truth-finder'). According to Buddhist tradition, the title chosen for Buddha by himself. The title was intended to convey his identity as a perfect being, though the precise meaning of the word remains problematic. Etymologically, it can be read as (i) 'thus-gone' (tatha gata) or 'thus-come' (tatha agata), generally taken to mean 'one who has gone (or come)' ie attained emancipation; (ii) 'one come (agata) to the truth (tatha)'. The etymology may itself be suspect, however, since it is
www.bloomington.in.us/~okolicko/definitions-3.html

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