'dig in' definitions:

Definition of 'dig in'

From: WordNet
verb
Occupy a trench or secured area; "The troops dug in for the night" [syn: entrench, dig in]
verb
Eat heartily; "The food was placed on the table and the children pitched in" [syn: pitch in, dig in]

Synonyms of 'dig in'

From: Moby Thesaurus