1.
back side; reverse side; back surface
The back or reverse surface of a physical object such as paper, a card, fabric, or a sign.
2.
hidden side; behind the scenes; hidden aspect
The unseen or concealed aspect of a situation, person, or event. The side that is not publicly known.
Related Words
Antonym:
表面 (surface)
Synonym:
裏 (back, reverse (everyday))
Compare:
背面 (back side)
Compare:
片面 (one side)
Compare:
底面 (bottom surface)