absent (adj.)

"not present, not in a certain place" (of persons), "non-existent" (of things), late 14c., from Old French absent, ausent "absent" and directly from Latin absentem (nominative absens), present participle of abesse "be away from, be absent," from assimilated form of ab "off, away from" (see ab-) + esse "to be" (from PIE root *es- "to be"). Related: Absently; absentness.

late 14c., "withdraw (oneself), go away, stay away," from Old French absenter "absent (oneself)," from Late Latin absentare "cause to be away," from Latin absentem (see absent (adj.)). Related: Absented; absenting.

"in the absence of," 1944, principally from U.S. legal use, from absent (adj.).