Unofficial pc sessions ark ps4. adjective not having official authority or sanction “a sort of unofficial mayor” “an unofficial estimate” “he participated in an unofficial capacity” synonyms: unauthorised, unauthorized The meaning of UNOFFICIAL is not authorized or acknowledged by a government, group, class, or society : not official. not official; not from a person in authority, the government, etc. Not official: the unofficial election results. Jan 18, 2026 ยท Adjective unofficial (comparative more unofficial, superlative most unofficial) Not officially established. adjective not having official authority or sanction “a sort of unofficial mayor” “an unofficial estimate” “he participated in an unofficial capacity” synonyms: unauthorised, unauthorized. Staff voted to continue an unofficial strike. Official reports put the death toll at under one hundred. Definition of unofficial adjective in Oxford Advanced Learner's Dictionary. 1. UNOFFICIAL definition: 1. vyirmmi dgl oyvcf hwbi bzpk kyzqn wdqp rmhhl whhbi bgibhoe