a combining form meaning “one's own,” used in the formation of compound words: proprioceptive.

Origin of proprio-

combining form representing Latin proprius one's own, special, particular, proper

motu proprio

[moh-too proh-pree-oh]

noun Latin.

any of certain documents issued by the pope without counsel from others.

Origin of motu proprio

literally, of one's own accord

proprio motu

[praw-pri-oh moh-too; English proh-pree-oh moh-too]

adverb Latin.

by one's own volition; on one's own initiative. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for proprio

Historical Examples of proprio

British Dictionary definitions for proprio

motu proprio


an administrative papal bull

Word Origin for motu proprio

Latin: of his own accord
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012