Mutinous/ˈmjuːtənəs/ Definition 1 of 2Pro Tip 1/3Authority Clash Used when someone directly opposes a leader or person in charge. During the voyage, the first mate's mutinous defiance startled the captain. Pro Tip 2/3Group Disobedience Often implies a collective uprising, not just one person. The mutinous soldiers formed a barricade against the general's orders. Pro Tip 3/3Severe Consequences In history, mutiny is a serious offense that could have extreme penalties. The mutinous act led to a court-martial for the members of the crew.