Best man

Best Best (b[e^]st), a.; superl. of Good. [AS. besta, best, contr. from betest, betst, betsta; akin to Goth. batists, OHG. pezzisto, G. best, beste, D. best, Icel. beztr, Dan. best, Sw. b["a]st. 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. [1913 Webster]

When he is best, he is a little worse than a man. --Shak. [1913 Webster]

Heaven's last, best gift, my ever new delight. --Milton. [1913 Webster]

2. Most advanced; most correct or complete; as, the best scholar; the best view of a subject. [1913 Webster]

3. Most; largest; as, the best part of a week. [1913 Webster]

{Best man}, the only or principal groomsman at a wedding ceremony. [1913 Webster]