Webster's Revised Unabridged Dictionary · 1913

Best

Best (best) , adjective

[Anglo-Saxon besta, best, contr. from betest, betst, betsta; akin to Gothic batists, Old High German pezzisto, German best, beste, Dutch best, Icelandic beztr, Danish best, Swedish bast. This word has no connection in origin with good. See Better.]

1.
Having good qualities in the highest degree; most good, kind, desirable, suitable, etc.; most excellent; as, the best man; the best road; the best cloth; the best abilities.
When he is best, he is a little worse than a man. — Shakespeare
Heaven's last, best gift, my ever new delight. — Milton
2.
Most advanced; most correct or complete; as, the best scholar; the best view of a subject.
3.
Most; largest; as, the best part of a week.
Collocations (1)
Best man , the only or principal groomsman at a wedding ceremony.

Best , noun

Utmost; highest endeavor or state; most nearly perfect thing, or being, or action; as, to do one's best; to the best of our ability.
Collocations (4)
At best , in the utmost degree or extent applicable to the case; under the most favorable circumstances; as, life is at best very short.
For best , finally. [Obsolete] Those constitutions... are now established for best, and not to be mended. — Milton
To get the best of , to gain an advantage over, whether fairly or unfairly.
To make the best of , (a) To improve to the utmost; to use or dispose of to the greatest advantage. Let there be freedom to carry their commodities where they can make the best of them. — Bacon (b) To reduce to the least possible inconvenience; as, to make the best of ill fortune or a bad bargain.

Best , adverb

1.
In the highest degree; beyond all others.
Thou serpent! That name best befits thee. — Milton
He prayeth best, who loveth best All things both great and small. — Coleridge
2.
To the most advantage; with the most success, case, profit, benefit, or propriety.
Had we best retire? I see a storm. — Milton
Had I not best go to her? — Thackeray
3.
Most intimately; most thoroughly or correctly; as, what is expedient is best known to himself.

Best , transitive verb

To get the better of. [Colloquial]