Definitions

1. noun

A person whose lifespan is exceptionally long.

“The doctor claimed that his patient was a modern-day Methuselah, having lived to be over 120 years old.”

2. noun

A tree (Pinus longaeva) found in the White Mountains of California, known for being one of the oldest living things on Earth.

“Visitors to the White Mountains can see ancient Methuselah trees that are thousands of years old.”