1. groups of people born and living at about the same time
Usage: plural of generation
2. the average time between the birth of parents and the birth of their children
Usage: plural of generation
3. successive stages in the development or improvement of something
Usage: plural of generation; often used with technology

Examples

• Three generations of the family lived in the same house.
• There are often conflicts between different generations.
• The older generations remember life before computers.
• New generations of smartphones are released every year.
• Scientists studied several generations of fruit flies.
• The company has produced five generations of this car model.
• Future generations will benefit from renewable energy.