HMS noun7 •A format for writing decimal angles. •Initialism of His/Her Majesty's Ship (prefix for ships in the navy of a monarchy, such as the British Royal Navy).One of the other two nations to operate the F-35B, the United Kingdom, has had US versions of the jet operating off its HMS Queen Elizabeth aircraft carrier. — 2018 •A 24 or 12-hour time format that includes seconds, in addition to hours and minutes. •A format for writing decimal time, usually associated with base-10 time such as during the French Revolution. •Initialism of hour-minute-second. •Initialism of His/Her Majesty's Service. •Initialism of hypermobility syndrome.