humeruslong bone of the upper arm: She broke her humerus.Not to be confused with:humorous ? marked by humor; funny, witty: She always says something humorous.Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embreehu·mer·us (hyo?o?m?r-?s)n. pl. hu·mer·i (-m?-r??) The long bone of the arm or forelimb, extending from the shoulder to the elbow.[Latin, upper arm.]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.humerus (?hju?m?r?s) n, pl -meri (-m??ra?) 1. (Anatomy) the bone that extends from the shoulder to the elbow2. (Zoology) the corresponding bone in other vertebrates[C17: from Latin umerus; related to Gothic ams shoulder, Greek ?mos]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014hu?mer?us (?hyu m?r ?s; often ?yu-) n., pl. -mer?i (-m??ra?) 1. the long upper bone of the vertebrate arm or forelimb, extending from the shoulder to the elbow. 2. brachium (def. 1). [1350?1400; Middle English