A small cloth (handkerchief) carried to wipe sweat, tears, hands, etc.; abbreviation of handkerchief.
ポケットにハンカチを入れて出かけた。
I put a handkerchief in my pocket and went out.
暑かったのでハンカチで汗を拭いた。
It was hot, so I wiped my sweat with a handkerchief.
彼女はプレゼントに刺繍入りのハンカチを渡した。
She gave an embroidered handkerchief as a present.