What does leave in mean?
leave in
Definition
To let a product stay on your hair for a while before washing it out.
Example sentences
I leave the conditioner in while I shave my legs, otherwise I don't have the patience.
I leave the conditioner in while I shave my legs, otherwise I don't have the patience.
The label says to leave the hair mask in for ten minutes, but I never last more than three.
The label says to leave the hair mask in for ten minutes, but I never last more than three.