have the measure of (someone or something)

have the measure of (someone or something)

To understand or know someone or something well and use that knowledge accordingly; to have an accurate conception of someone or something. I have the measure of the students, and I just don't think that topic will hold their interest at an assembly.
See also: have, measure, of

have the measure of someone

COMMON If you have the measure of someone or something, you understand them or know what they are like and are able therefore to deal with them. Lili was the only person I knew who had the measure of her brother. He had the measure of Allen and his friends, and he treated them with polite contempt. Note: You can also say that you get the measure of someone or something or take the measure of them, meaning that you discover what they are like. Amsterdam is that rare thing: a major city you can get the measure of in just four days. I was just taking the measure of the opposition.
See also: have, measure, of, someone

get/have/take the ˈmeasure of somebody

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get/have/take somebody’s ˈmeasure

(formal) form an opinion about somebody’s character or abilities so that you can deal with them: The champion soon had the measure of his young opponent.
See also: get, have, measure, of, somebody, take