Definition of "aoristic" []

• Of or being the verbal aspect that expresses a momentary or completed action, especially in past time. (adjective)
• Of or being the perfective aspect. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "It differs from the aoristic past tense (35) and from the imperfect (113) by expressing an act or condition as definitely completed or perfected."
• "It differs from the aoristic present by expressing an action as definitely in progress, or a condition as continuously existing, at the moment of speaking."
• "Compound tenses occur less often in Esperanto than in English, and an aoristic Esperanto tense may often be translated by an English compound tense, as "La birdoj flugas", the birds are flying."