boundary

 
Pronunciation: /ˈbaʊnd(ə)ri/

noun (plural boundaries)

  • 1a line which marks the limits of an area; a dividing line: a county boundary the river marks the boundary between the two regions [as modifier]: a boundary wall
  • (often boundaries) a limit of something abstract, especially a subject or sphere of activity: a community without class or political boundaries
  • 2 Cricket a hit crossing the limits of the field, scoring four or six runs.

Origin:

early 17th century: variant of dialect bounder, from bound2 + -er1, perhaps on the pattern of limitary

Spelling help

The ending of boundary is spelled -ary.