Noun

• S: (n) impaction (the condition of being pressed closely together and firmly fixed)
• S: (n) impaction (a disorder in which feces are impacted in the lower colon)
• S: (n) impaction, impacted tooth (a disorder in which a tooth is so crowded in its socket that it cannot erupt normally)
• S: (n) impingement, impaction (a sharp collision produced by striking or dashing against something)