e·rec·tion (?-r?k?sh?n)n.1. The act of erecting.2. Something erected; a construction.3. a. The firm, enlarged condition of a usually flaccid body part when the tissue within it becomes filled with blood, especially of the penis or clitoris.b. The process of filling with blood.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.erection (??r?k??n) n1. the act of erecting or the state of being erected2. something that has been erected; a building or construction3. (Physiology) physiol the enlarged state or condition of erectile tissues or organs, esp the penis, when filled with blood4. (Physiology) an erect penisCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014e?rec?tion (??r?k ??n) n. 1. the act of erecting. 2. the state of being erected. 3. something erected. 4. a. a distended and rigid state of an organ or part containing erectile tissue, esp. the penis. b. an instance of this or a part or tissue in this state. [1495?1505;