Brown Driver Briggs

 1. to gather, receive, remove, gather in
  1) (Qal)
1a1. to gather, collect
1a2. to gather (an individual into company of others)
1a3. to bring up the rear
1a4. to gather and take away, remove, withdraw
  2) (Niphal)
1b1. to assemble, be gathered
1b2. (pass of Qal 1a2.
1b  1) to be gathered to one's fathers
1b  2) to be brought in or into (association with others)
1b3. (pass of Qal 1a4.
1b  1) to be taken away, removed, perish
  3) (Piel)
1c1. to gather (harvest)
1c2. to take in, receive into
1c3. rearguard, rearward (subst)
  4) (Pual) to be gathered
  5) (Hithpael) to gather oneself or themselves