Definitions

1. noun

The lowest or most depressing point of a period of time, especially in someone’s fortunes or mood.

“She hit rock bottom, but then she found the strength to climb back up to a higher point, far from her nadir.”

2. noun

The lowest or most southerly point of the sun’s path across the sky.

“The astronomer carefully calculated the position of the sun at its nadir, taking into account the Earth’s tilt and orbit.”

3. noun

The lowest point of an orbiting body’s path around another celestial body.

“The spacecraft’s nadir was its lowest point, passing close to the surface of the planet it was orbiting.”

4. verb

To reach or be at the nadir, especially in someone’s fortunes or mood.

“She felt she was hitting the nadir of her life, having lost her job and her home.”