What is "me'asha"

Me'asha was the name of three important rabbis of the Mishnaic and Talmudic periods.

1. Me'asha was a tanna to whom one reference occurs in the Mishna (Peah ii. 6), from which it appears that he lived in the time of Hillel's descendants (comp. Heilprin, "Seder ha-Dorot," ii.).
2. Me'asha ben Joseph (?), an aggadist and mystic who died in the time of Ammi (Ket. 85b)
3. Me'asha (amora), an amora in the Land of Israel of the fourth century CE

Me'asha was an amora in the Land of Israel of the fourth century CE; mentioned as a companion of Samuel ben Isaac and Zera (Yer. Ber. ii. 9 et al.). His halakhic and aggadic sentences are met with in both Talmudim.