"person devoted to religious work," 1756, from Medieval Latin oblatus, noun use of Latin oblatus, variant past participle of offerre "to offer, to bring before," from ob- (see ob-) + latus "carried, borne" (used as suppletive past participle of ferre "to bear"), from *tlatos, from PIE root *tel-, *tol- "to bear, carry" (see extol).
(from Latin oblatus, "one offered up"), in Roman Catholicism, a lay person connected with a religious order or institution and living according to its regulations; a minor dedicated by his parents to become a monk according to the Benedictine Rule; or a member of either the Oblates of Mary Immaculate (O.M.I.) or the Oblates of St. Francis de Sales (O.S.F.S.)