| Nadir 1. (n.) The lowest point; the time of greatest depression -- opposite of peak. 2. (n.) That point of the heavens, or lower hemisphere, directly opposite the zenith; the inferior pole of the horizon; the point of the celestial sphere directly under the place where we stand. Thesaurus Entries base, baseboard, basement, bedrock, bottom, chassis, dado, foot, footing, foundation, frame, keel, lower strata, lowest level, lowest point, mopboard, shoemold, sole, toe, underlying level, wainscot |