Having relatively great extent from one surface or side to the opposite; See examples of thick used in a sentence. The meaning of thick is having or being of relatively great depth or extent from one surface to its opposite.

If something that consists of several things is thick, it has a large number of them very close together. She inherited our father's thick, wavy hair. They walked through thick forest. What's the first thing you thought seeing my plus-size body ? When something's thick, it's wide from one side to the other, like a thick piece of french toast or a thick layer of snow on your car. Thick things are broad or bulky or decidedly not thin †think of the thick … We're really in the thick of things now.

When something's thick, it's wide from one side to the other, like a thick piece of french toast or a thick layer of snow on your car. Thick things are broad or bulky or decidedly not thin †think of the thick … We're really in the thick of things now. She stood by me through thick and thin.