adjective

1. of much more than ordinary size, extent, volume, etc.; esp.,
   1. designating a thing or group of things larger than others of the same kind the great cats are tigers, lions, etc.; the Great Lakes
   2. large in number, quantity, etc.; numerous a great company
   3. long in duration a great while
2. much higher in some quality or degree; much above the ordinary or average; esp.,
   1. existing in a high degree; intense a great light, great pain
   2. very much of a; acting much as (something specified) a great reader
   3. eminent; distinguished; illustrious; superior a great playwright
   4. very impressive or imposing; remarkable great ceremony
   5. having or showing nobility of mind, purpose, etc.; grand a great man, great ideas
3. of most importance; main; chief the great seal
4. Informal clever; expert; skillful: usually with at great at tennis
5. ☆ Informal excellent; splendid; fine
6. Now Chiefly Dial. pregnant
   chiefly in great with child

Etymology: ME grete < OE great, akin to Ger gross, Du groot < IE base *ghrēu-, rub hard over, crumble > grit, Welsh gro, sand: basic sense “coarse, coarsegrained”

adverb

noun