'lay in' definitions:

Definition of 'lay in'

From: WordNet
verb
Keep or lay aside for future use; "store grain for the winter"; "The bear stores fat for the period of hibernation when he doesn't eat" [syn: store, hive away, lay in, put in, salt away, stack away, stash away]

Synonyms of 'lay in'

From: Moby Thesaurus