noun
definitive stamp; regular postage stamp
A standard postage stamp issued for everyday use, as opposed to commemorative or special-purpose stamps.
普通切手は郵便局でいつでも買えます。
You can buy definitive stamps at the post office anytime.
記念切手 is a commemorative stamp issued for a special event or anniversary, while 普通切手 is a regular definitive stamp for everyday postal use.
Compound of 普通 (ordinary, regular) and 切手 (stamp).