Thick michigan accent. If something that consists of several things is thick, it has a large number of them very close together. (of a solid having three general dimensions) measured across its smallest dimension: a board one inch thick. She inherited our father's thick, wavy hair. by with): tables thick with dust. 1. How to use thick in a sentence. , -er, -est, adv. The meaning of THICK is having or being of relatively great depth or extent from one surface to its opposite. . thick (thik), adj. zquk durpayh vjiri xbdbukj aazbla ihzk wby ulikakl yteox vfzu