1. At the side of; next to. 2a. In comparison with: a proposal that seems quite reasonable beside the others.b. On an equal footing with: has earned a place beside the best performers in the business.3. In addition to: Many creatures beside man live in communities (Stuart Chase). See Usage Note at besides. 4. Except for. See Usage Note at besides. 5. Not relevant to: a remark that was beside the point.
ADVERB:
Archaic1. In addition. 2. Nearby.
IDIOM:
beside (oneself) In a state of extreme excitement or agitation: They were beside themselves with glee.
ETYMOLOGY:
Middle English biside, from Old English be sdan : be, by; see by1 + sde, side.