upside

noun

1. the upper side or part.
2. that part of a chart or graph that shows a higher level, especially in price.
3. an upward trend, as in stock prices.
4. a positive result.
5. an encouraging or positive aspect.

adjective

6. going higher, especially in price or worth: This stock has a nice upside potential.

preposition

7. on or against the side of: Give him a smack upside the head.

Idioms

8. get upsides with, British. to get even with.

noun

1. the upper surface or part

1610s, “upper side or surface,” from up + side. Phrase upside (someone’s) head in reference to a blow to the head is recorded from 1970, U.S. black slang.

In addition to the idiom beginning with upside

• upside the head

also see:

• turn upside down