Verb: thin out
- Make sparse
"thin out the young plants"
- Become sparser
"Towards the end of town, the houses thinned out"
- Lessen the strength or flavour of a solution or mixture
"She thinned out the sauce with water";
- dilute, thin, cut
Derived forms: thinned out, thinning out, thins out
Type of: bring down, come down, cut, cut back, cut down, decrease, dent, diminish, fall, go down, lessen, reduce, sink, trim, trim back, trim down, weaken