noun

1. The overside or up-side of a flat object such as a table, or of a liquid.

2. The outside hull of a tangible object.

3. Outward or external appearance.

   “On the surface, the spy looked like a typical businessman.”

Synonyms: overside, superfice

verb

1. To provide something with a surface.

2. To apply a surface to something.

3. To rise to the surface.