1. The condition of being old: The jacket Alice wore for gardening showed many signs of age.
2. The number of years, months, days, etc. that a person has lived: Tony asked his friend if he were the same age as Greg.
3. One of the periods of life: When Mrs. Thompson reached middle age, she noticed that she couldn't run as fast as she could when she was younger.
4. An important period of time in the Earth's history: The Bronze Age or the Iron Age are two examples of great periods in the history of the Earth.
5. A generation: In their town there was a large complex with three ages living in it, grandparents, parents, and children!
5. The later stage of life: Mary asked her grandfather, "Does wisdom automatically come with age?"
6. A long time: It seemed like ages when Max waited for the bus to come.

The period in human development starting with the Industrial Revolution and progressing into the present time: "There are some people who describe the Industrial Age as the Postindustrial Age because of the reduction of traditional manufacturing as opposed to the service economy or an economic system or sector based on the buying and selling of services."

The relative maturity of a soil profile: In class Susan learned about the pedologic age as being the matureness or age of the of the earth's soils, shown in various layers.