take on a certain form, attribute, or aspect; "His voice took on a sad tone"; "The story took a new turn"; "he adopted an air of superiority"; "She assumed strange manners"; "The gods assume human or animal form in these fables"
(1) To assume the legal relationship of parent to another person's child. See also adoption. (2) To approve or accept something -- for example, a legislative body may adopt a law or an amendment, a government agency may adopt a regulation or a party to a lawsuit may adopt a particular argument.
In the Objective-C language, a class is said to adopt a protocol if it declares that it implements all the methods in the protocol. Protocols are adopted by listing their names between angle brackets in a class or category declaration.