drop in

US /drɑːp ɪn/

UK /drɑːp ɪn/

1.

to pay a casual visit to someone without making a prior arrangement

:

•

Feel free to drop in anytime you're in the neighborhood.

•

I might drop in on my way home from work.

:

visit call on stop by pop in look in on

2.

to decrease or fall suddenly and significantly

:

•

The temperature is expected to drop in the evening.

•

Sales tend to drop in the off-season.

:

decline fall decrease plummet sink

:

drop drops drop in on drop into drop by drop out drop off