so·cial
[soh-shuh l]

adjective
1. pertaining to, devoted to, or characterized by friendly companionship or relations: a social club.

2.seeking or enjoying the companionship of others; friendly; sociable; gregarious.

3.of, pertaining to, connected with, or suited to polite or fashionable society: a social event.

4.living or disposed to live in companionship with others or in a community, rather than in isolation: People are social beings.

5.of or pertaining to human society, especially as a body divided into classes according to status: social rank.

6.involved in many social activities: We’re so busy working, we have to be a little less social now.

7.of or pertaining to the life, welfare, and relations of human beings in a community: social problems.

8.noting or pertaining to activities designed to remedy or alleviate certain unfavorable conditions of life in a community, especially among the poor.

9.pertaining to or advocating socialism.

10.Computers . noting or pertaining to online technologies, activities, etc., that promote companionship or communication with friends and other personal contacts: social Web sites such as Facebook; the use of social software to share expertise.

11.Zoology . living habitually together in communities, as bees or ants. Compare solitary ( def. 8 ) .

12.Botany . growing in patches or clumps.

13.Rare . occurring or taking place between allies or confederates.

noun 
14. a social gathering or party, especially of or as given by an organized group: a church social.