noun A compression; the packing together of loose matter.
noun Something packed together tightly; a mass of densely-packed matter.
noun A solid, immobile bulk of stool.
noun The failure of a tooth to erupt into the dental arch, because of adjacent teeth, dense overlying bone, excessive soft tissue, or other factor.
noun The situation where an institute, usually a college or university, receives more applications from qualified applicants than the number of spaces available, meaning that meeting the minimum admission requirements does not guarantee acceptance.