boundary

noun

1. the line or plane indicating the limit or extent of something

   noun.location

   Synonyms bound bounds

   Source: WordNet 3.0

2. a line determining the limits of an area

   noun.shape

   Synonyms bound edge

   Source: WordNet 3.0

3. the greatest possible degree of something

   noun.attribute

   Synonyms bound limit

   Source: WordNet 3.0

4. That which indicates or fixes a limit or extent, or marks a bound, as of a territory; a bounding or separating line; a real or imaginary limit.

   noun

   Source: webster1913