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general::
Phrase(s): thin something out
to make something less dense; to scatter something. • You will have to thin the young plants out, because there is not room for all of them. • Can you thin out these young plants?, Phrase(s): thin out
to spread out; to become less dense. • The trees began to thin out as we got higher up the mountain. • The crowd began to thin out as we got a little farther from the theater.
McGrawhill's American Idioms And Phrasal Verbs