identity

US /aɪˈdɛntɪti/

UK /aɪ'dentətɪ/

B1
n. (c./u.)Noun (Countable/Uncountable)Collection of qualities that makes a person
He lost the bag with his documents and he couldn't prove his identity
n. (c./u.)Noun (Countable/Uncountable)Who someone is; the name of a person
The police are trying to determine the identity of the suspect.
n. (c./u.)Noun (Countable/Uncountable)The state of being the same
The identity of the fingerprints confirmed his presence at the scene.
n. (c./u.)Noun (Countable/Uncountable)An equation that is true for all values of the variables
The trigonometric identity sin²(x) + cos²(x) = 1 is fundamental.

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