be·side 
(bĭ-sīd)
(bĭ-sīd)prep.
1. At the side of; next to.
2.
a. 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.
adv.
Archaic
Idiom: Archaic
1. In addition.
2. Nearby.
beside (oneself)
In a state of extreme excitement or agitation: They were beside themselves with glee.
[Middle English biside, from Old English be sīdan : be, by; see BY1 + sīde, side.]