Lifetime (noun)

1. The period of time that a person is alive.
2. The duration of a person's life.

Origin:

Late 16th century: from life + time.

Examples:

1. He lived a long lifetime.
2. She accomplished a lot in her lifetime.
3. I've known her for a lifetime.
4. The product has a lifetime warranty.
5. The artist's works will be appreciated for a lifetime.