1. a long curved yellow fruit with soft sweet flesh and thick skin
2. the tropical plant that produces bananas

1. crazy or silly
Usage: informal

Examples

• She ate a banana for breakfast.
• The monkey peeled the banana carefully.
• We bought a bunch of ripe bananas at the store.
• The banana tree grew tall in the tropical garden.
• Banana bread is my favorite dessert.
• That idea is completely banana!
• He went banana when he heard the news.