Link to this page noun: some of the four angles formed between two straight lines intersected by a third straight-line. The angle formed inside a polygon by two adjacent sides. The inner perspective between two sides of a polygon. the perspective inside two adjacent edges of a polygon View More adjective: an angle formed between two sides, within any rectilinear figure, as a polygon, or between two synchronous lines by these outlines and another intersecting all of them; -- called in addition internal perspective. Related Sources Definition for "interior angle" some of the four angles formed between two… View More Sentence for "interior angle" This quatrefoil joins the interior angle… View More Synonym for "interior angle" Hyponym for "interior angle" Hypernym for "interior angle" Cross Reference for "interior angle"