1. large in size, amount, or extent
2. important or significant
3. older or grown-up

1. in a big manner; to a great extent
Usage: informal

Examples

• The elephant is a big animal.
• She made a big mistake on the test.
• My big sister is in college now.
• That movie was big last summer.
• He talks big but doesn’t follow through.
• The company thinks big about expansion.
• It’s a big decision to make.