noun
ex-girlfriend; former girlfriend
Refers to a woman one previously dated. Neutral term, commonly used in casual conversation.
昨日、偶然元彼女に会った。
I ran into my ex-girlfriend by chance yesterday.
彼はまだ元彼女のことを忘れられないらしい。
He still can't seem to forget his ex-girlfriend.
元カノ is a more casual, slangy abbreviation of 元彼女, often used in informal speech.
Compound of 元 (former) and 彼女 (girlfriend).