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Noun[edit] cavity â(plural cavities) 1  A hole or hollow depression. 2  A hollow area within the body (such as the sinuses). ( dentistry) A soft area in a decayed tooth.
Noun. 1. uterine cavity-the space inside the uterus between the cervical canal and the Fallopian tubes. bodily cavity, cavum, cavity - (anatomy) a natural hollow or sinus within the body. uterus, womb-a hollow muscular organ in the pelvic cavity of females; contains the developing fetus.