most 
(mōst)
(mōst)adj. Superlative of many, much.
1.
a. Greatest in number: won the most votes.
b. Greatest in amount, extent, or degree: has the most compassion.
2. In the greatest number of instances: Most fish have fins.
n.
1. The greatest amount or degree: She has the most to gain.
2. Slang The greatest, best, or most exciting. Used with the: That party was the most!
pron.
(used with a sing. or pl. verb) The greatest part or number: Most of the town was destroyed. Most of the books were missing.
adv. Superlative of much.
Idiom: 1. In or to the highest degree or extent. Used with many adjectives and adverbs to form the superlative degree: most honest; most impatiently.
2. Very: a most impressive piece of writing.
3. Informal Almost: Most everyone agrees.
at (the) most
At the maximum: We saw him for ten minutes at the most. She ran two miles at most.
[Middle English, from Old English mǣst, māst; see mē-3 in the Appendix of Indo-European roots. Adv., sense 3, short for ALMOST.]