Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun boundary

3 senses of boundary

Sense 1
boundary, bound, bounds -- (the line or plane indicating the limit or extent of something)
       => extremity -- (the outermost or farthest region or point)

Sense 2
boundary, edge, bound -- (a line determining the limits of an area)
       => line -- (a length (straight or curved) without breadth or thickness; the trace of a moving point)

Sense 3
limit, bound, boundary -- (the greatest possible degree of something; "what he did was beyond the bounds of acceptable behavior"; "to the limit of his ability")
       => extent -- (the distance or area or volume over which something extends; "the vast extent of the desert"; "an orchard of considerable extent")