1. to a great extent; very much; in a major way
Usage: informal; often used with 'in' or as part of the phrase 'in a big way'

1. of major importance or significance; prominent or successful at a high level
Usage: informal; often hyphenated as 'big-time' when used attributively

Examples

• She made it bigtime as an actress after years of small roles.
• He messed up bigtime when he forgot the presentation.
• That's a bigtime opportunity you shouldn't pass up.
• The team improved bigtime after hiring a new coach.
• She's a bigtime player in the tech industry now.
• We celebrated bigtime when we won the championship.