The source of nadir is naḍhīr, meaning "opposite"—the opposite, that is, of the zenith, the highest point of the celestial sphere which is positioned vertically above the observer. (The word zenith itself is a …

Nadir Diagram showing the relationship between the zenith, the nadir, and different types of horizon. Note that the zenith is opposite the nadir. The nadir[a][b] is the direction pointing directly below a …

NADIR definition: 1. the worst moment, or the moment of least hope and least achievement: 2. the point at which…. Learn more.

3 days ago · Diagram showing the relationship between the zenith, the nadir, and different types of horizon. Nadir is opposite the zenith.

The lowest point or the bottom of something, whether it's a physical location, an emotional state, or a situation. See example sentences, synonyms, and etymology for the noun nadir.

Sep 13, 2025 · What Does Nadir Mean in English? The Short Answer. Simply put, “nadir” means the lowest point of something — like the absolute bottom. Imagine your mood after a brutal Monday …

In fact, nadir is derived from the Arabic nazir, which means “opposite to.” It is still used in astronomy to indicate the part of the celestial sphere located directly below an observer, but also more generally to …

In astronomy, the nadir is the point at which the sun or moon is directly below you, on the other side of the earth. Compare zenith.

There are five meanings listed in OED's entry for the noun nadir, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

The nadir of American race relations is a historical period defined by Rayford Logan as encompassing the worst time for race relations in the United States after the Civil War, which ended slavery.