Added 10 October 2026 commander-in-chief noun Categories: PeopleObscure Words noun ! Definition from WordNet 3.1, Princeton University. More about commander-in-chief at Wordnik → Where our words come from → The officer who holds the supreme command. in the U.S. the president is the commander in chief Related Words: major-generalchiefcommandercommandantcommandingcommandleaderheadclcc-in-ccinccmdr Back to today's word