Here are some examples of things that can thin out or can be thinned out:
(meaning to make or become less dense, crowded, or numerous)
A crowd
Your hair (If it's too thick, or it's falling out)
Something growing in your garden ( to make space for it to grow)
A sauce, soup or stew
Any other liquid substance that can be diluted
The Visual Thesaurus is an amazing tool!
