Synonyms of boundary

Noun

1. boundary, bound, bounds, extremity

usage: the line or plane indicating the limit or extent of something

2. boundary, edge, bound, line

usage: a line determining the limits of an area

3. limit, bound, boundary, extent

usage: the greatest possible degree of something; "what he did was beyond the bounds of acceptable behavior"; "to the limit of his ability"

Definition and meaning of boundary (Dictionary)