Thayer's Greek Lexicon

 1. fellowship, association, community, communion, joint participation,
intercourse
  1) the share which one has in anything, participation
  2) intercourse, fellowship, intimacy
1b1. the right hand as a sign and pledge of fellowship
(in fulfilling the apostolic office)
  3) a gift jointly contributed, a collection, a contribution,
as exhibiting an embodiment and proof of fellowship