noun
official government postcard; postal card
Refers to postcards issued by the government or postal authority, often with pre-printed postage. Commonly used in contexts like 官製葉書で応募する (apply using an official postcard).
懸賞に応募するときは官製葉書を使います。
When entering a contest, I use an official government postcard.
私製葉書 is a privately made postcard, whereas 官製葉書 is issued by the government/post office and typically has a pre-printed stamp.
Compound of 官製 (government-made) and 葉書 (postcard).