dig in phrasal verb ( see also ↑ dig )
1 . dig something ↔ in ( also dig something into something ) to mix something into soil by digging:
Dig some fertilizer into the soil first.
2 . ( also dig (something) into something ) to push a hard or pointed object into something, especially someone’s body, or to press into something:
She dug her fingernails into his arm.
dig something ↔ in
He dug his spurs in and urged his horse on.
I could feel one of the hooks digging in.
3 . if a group of people, especially soldiers, dig in, they make a protected place for themselves or prepare for a difficult situation:
The troops dug in along the defensive line.
We just have to dig in and hope we can turn things around.
4 . ( also dig into something ) informal to start eating food that is in front of you:
Go on – dig in!
He was already digging into his pie and chips.