decide /dɪˈsaɪd/verb 5forms 6phrases 1 verb5 •to make a choice that settles a question or an argumentThe election will be decided on foreign policies.It was decided to meet here at midnight. •To make a judgment, especially after deliberation.You must decide between good and evil.I have decided that it is healthier to walk to work. •To cause someone to come to a decision.Your admonition decided me against my intended course of action. •Of a Turing machine: to return a correct answer (for some yes-or-no problem) on every possible input.No Turing Machine can decide the halting problem. •(no longer used) To cut off; to separate.Our seat denies us traffic here; / The sea, too near, decides us from the rest. — 1642 formsdecided · decidedst · deciding · decides · decideth · decidest Phrases with decide decide onTo choose (something) after carefully considering one's options.