1. plural of dynamo; machines that convert mechanical energy into electrical energy, or generators
Usage: technical; often used in historical or industrial contexts
2. plural of dynamo; energetic, hardworking, or highly motivated people
Usage: informal; figurative

Examples

• The factory installed new dynamos to power the machinery.
• Those dynamos in the marketing department never stop working.
• Early dynamos were essential to the development of modern electrical systems.
• She and her brother are both dynamos—always starting new projects.
• The old dynamos in the museum show how electricity was generated a century ago.
• The team's dynamos led them to victory with their tireless effort.