1.
When a number of people chip in , each person gives some money so that they can pay for something together. ( INFORMAL )
They chip in for the petrol and food...
The brothers chip in a certain amount of money each month to hire a home health aide.
= contribute
PHRASAL VERB : V P , V P n (not pron) , also V P with n
2.
If someone chips in during a conversation, they interrupt it in order to say something. ( INFORMAL )
‘That’s true,’ chipped in Quaver...
He chipped in before Clements could answer.
PHRASAL VERB : V P with quote , V P