Definitions

1. noun

A prefix meaning ‘around, surrounding, or on the outside of something’.

“The circum of the city was crowded with people.”

2. prefix

Used to form words that have to do with going around, surrounding, or on the outside of something.

“circumference, circumnavigate”

3. adverb

In a circular or curved manner, or around something.

“The tourists circum the mountain to see the scenic views.”