expound (up)on (someone or something) to (someone or something)

expound (up)on (someone or something) to (someone or something)

To talk about or explain someone or something in detail. Please expound on Claire to me because I can't understand some of the wacky things she's done. I had to expound upon my thesis proposal, but the professor did eventually approve my topic.

See also: expound, to

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