ex /ɛks/noun 3adjective 4verb 2forms 5 noun3 •(informal) a person whom someone was once married to or in a relationship withMy friend has an ex who now lives abroad.Her ex is still sending her flowers, even though she has moved on. •The name of the Latin script letter X/x.Thus first C checks to see if ex and wye are equal. The resulting value of 1 or 0 (true or false) then is compared to the value of zee. — 1984 •(Canada) Clipping of exhibition. adjective4 •Ex-, former, previously but no longer. •My algebra II teacher's dad is an ex PE teacher at the same school. •the place the train originated from or called at prior to the present location.The train was the 12.40 p.m. ex Derby on January 14th, 1914 — 1921 •(Singapore, informal) expensive, dearIt's too ex. verb2 •To delete; to cross out. •(slang) To extinguish the life of.You upset cuz your friend got exed I got pissed cuz my bro got knifed — 2023 formsexed · exing · exes · more ex · most ex