to collect a group of things {esp. crops, harvest} and put them together in a safe place
We watched them gathering in the harvest.
phrasegather in gather in sth/gather sth in to collect a group of things together and put them or store them somewhere - used especially about collecting crops: The farmers were out in the fields, gathering in the harvest.■ SIMILAR TO: gather
gather in
To bring someone or something in to some place or thing. A noun or pronoun can be used between "gather" and "in." Gather in the kids and I'll get the cake.The CEO's receptionist gathered us in for the meeting.