overbrimming UK /əʊvəˈbɹɪmɪŋ/US /oʊ.vɚˈbɹɪmɪŋ/ adjective1 •(rare) Being plentiful, particularly excessively so.The fisherman who takes two little orphans into his already overbrimming family belongs fortunately to a world not altogether of legend. — 1888