(a.) Not seasonable; being, done, or occurring out of the proper season; ill-timed; untimely; too early or too late; as, he called at an unseasonable hour; unseasonable advice; unseasonable frosts; unseasonable food.

ahead of time anachronistic antedated bad beforehand behind time behindhand dated deplorable early foredated futile ill-adapted ill-advised ill-assorted ill-chosen ill-considered ill-fitted ill-matched ill-seasoned ill-sorted ill-suited ill-timed impolitic improper inadmissible inadvisable inapplicable inapposite inappropriate inapt inauspicious incongruous inconvenient inept inexpedient infelicitous inopportune intempestive intrusive irrelevant late mal a propos maladjusted malapropos metachronistic misdated misjoined mismatched mismated misplaced mistimed off base out of character out of date out of joint out of keeping out of line out of phase out of place out of proportion out of season out of time out of tune overdue parachronistic past due postdated premature prochronistic tardy too late too soon unadapted unapt unbecoming unbefitting undesirable undue unfavorable unfit unfitted unfitting unfortunate unhandy unhappy unlucky unmeet unprofitable unpropitious unpunctual unqualified unready unripe unseemly unsuitable unsuited untimely untoward unwise wrong