Definitions from Wiktionary ( )

▸ noun:  The murmuring sound made by a dove or pigeon.
▸ noun:  (by extension) An expression of pleasure made by a person.
▸ verb:  (transitive, intransitive) To make a soft murmuring sound, as a pigeon.
▸ verb:  (intransitive) To speak in an admiring fashion, to be enthusiastic about.
▸ adjective:  (slang) Cool.
▸ noun:  Initialism of chief operating officer. [(business) A corporate officer of a corporation, company, or agency, responsible for executing decisions of the chief executive officer (CEO) according to their decided schedule; often initialised as COO.]
▸ noun:  (international trade) Initialism of country of origin. [(law) The country in which a person or thing is deemed to have originated for the purposes of laws and regulations.]

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