B1[C]a person who behaves in a silly way without thinking: [as form of address]You fool, you've missed your chance!He's a fool if he thinks she still loves him.[+ to infinitive]He's a fool to think she still loves him.He's fool enough to think she still loves him.My fool of a(= silly) husband has gone out and taken my keys!Stupid and silly people›[C]in the past, a person who was employed in the court of a king or queen to make them laugh by telling jokes and doing funny thingsEntertainers in generalact/play the fool›to behave in a silly way, often intentionally to make people laugh: Stop acting the fool, I'm trying to talk to you.Behaving in a silly wayany fool›anyone: Any fool could tell that she was joking.Someone, anyone, no one or everyonemake a fool of sbB2to trick someone or make them appear stupid in some wayCheating and trickingPlotting and trappingmake a fool of yourselfB2to do something that makes other people think you are silly or not to be respected: I got a bit drunk and made a fool of myself.Behaving in a silly waymore fool sbmainly UK›said to mean that you think someone is being unwise: "I lent Rhoda $100 and she hasn't paid me back." "More fool you - you know what she's like!"Stupid and sillyOf unsound mindbe no fool(alsobe nobody's fool)›to not be stupid or easily deceived: I notice Ed didn't offer to pay for her - he's no fool.IntelligencePerceptive