|part of speech:
||the lowest or most depressing point or stage.
His disastrous fall at the world championships five years ago brought him to the nadir of his career.
- acme, apex, climax, height, summit, zenith
- similar words:
||the point on the heavenly sphere directly below a specified position on the earth's surface and at the other end of the diameter drawn from the zenith.
||bottom, low, zero