also: うわがわ
noun, noun which may take the genitive case particle 'no'
upper side; top surface
Refers to the upper side or surface of something, often contrasted with 下側 (underside). Can be used as a noun or with の to modify another noun.
Please put the label on the top side of the box.
The documents are in the upper drawer.
Standard kanji spelling. The reading うわがわ is more common than うわかわ.
Less common reading for the same kanji form.
Compound of 上 (うわ, 'upper') and 側 (がわ, 'side'). The reading うわかわ is a variant, but うわがわ is more common.