Definition of "protrusion" [pro•tru•sion]

• The act of protruding. (noun)
• The state of being protruded. (noun)
• Something that protrudes. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Just northeast of it is another, larger protrusion, which is Mount Eagle."
• "The protrusion was the size of a man's head, and could not be replaced."
• "But the omission of all mention both of 'protrusion' and of the 'dog days' makes the Latin almost without meaning."