2. Noun. A punch line of a joke or comedy routine. ¹
3. Noun. A joke, an attempt to fool someone or to make them angry. ¹
4. Noun. (baseball) the part of a pitch where the pitcher moves his or her arm backwards before throwing the ball. ¹
5. Adjective. (context: of a machine) needing to be wound up in order to function. ¹
¹ Source: wiktionary.com