per·fec·tive
(pər-fĕk′tĭv)adj.1. Tending toward perfection.
2. Grammar Of, related to, or being the aspect that expresses the completion or the result of the action denoted by the verb.
n. Grammar 1. The perfective aspect.
2. A perfective verb form.
3. A verb having a perfective form.
per·fec′tive·ly adv.
per·fec′tive·ness, per′fec·tiv′i·ty (pûr′fĕk-tĭv′ĭ-tē) n.
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.
perfectiveness
(pəˈfɛktɪvnəs) nformal the state or quality of being perfective
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014