From BiblePortal Wikipedia

King James Dictionary [1]

INGATH'ERING, n. in and gathering. The act or business of collecting and securing the fruits of the earth harvest a the feast of ingathering.  Exodus 23

Webster's Dictionary [2]

(n.) The act or business of gathering or collecting anything; especially, the gathering of the fruits of the earth; harvest.

Hastings' Dictionary of the Bible [3]

Ingathering . See Tabernacles [Feast of].