"removal or cutting away," early 15c., from Latin abscissionem (nominative abscissio) "a cutting off, a breaking off, interruption," noun of action from past-participle stem of abscindere "to cut off, divide, part, separate" (see abscissa).
"depart suddenly and secretly," especially to escape debt or the law, 1560s, from French abscondre "to hide" and directly from Latin abscondere "to hide, conceal, put out of sight," from assimilated form of ab "off, away from" (see ab-) + condere "put together, store," from assimilated form of com- "together" (see com-) + -dere "put" (from PIE root *dhe- "to put, place"). Related: Absconded; absconder; absconding.
"practice or habit of being absent," 1822, from absentee + -ism; originally in reference to landlords, especially in Ireland, who lived at a distance from their estates (the earlier word was absenteeship (1778) and Johnson's dictionary has absentee in the landlord sense). In reference to pupils or workers from 1922.