noun
Abbreviation of 郵便葉書 (postal card). The standard word for a postcard in Japanese.
See also: 郵便葉書
旅行先からはがきを送った。
I sent a postcard from my travel destination.
年賀はがきを買いに行く。
I'm going to buy New Year's postcards.
noun
A brief written message or note, not necessarily a postal card. Often used in compounds like メモはがき.
ちょっとした伝言ははがきに書いて机に置いた。
I wrote a short message on a card and left it on the desk.