-some 1suff. Characterized by a specified quality, condition, or action: bothersome.[Middle English -som, from Old English -sum, -like; see sem- in Indo-European roots.]-some 2suff. A group of a specified number of members: threesome.[Middle English -sum, from Old English sum, some; see some.]-some 3suff.1. Body: centrosome.2. Chromosome: monosome.[From Greek s?ma, body; see teu?- in Indo-European roots.]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.-some suffix forming adjectives characterized by; tending to: awesome; tiresome. [Old English -sum; related to Gothic -sama, German -sam]-some suffix forming nouns indicating a group of a specified number of members: threesome. [Old English sum, special use of some (determiner)]-some (-s??m) n combining forma body: chromosome. [from Greek s?ma body]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014some (s?m; unstressed s?m) adj. 1. being an undetermined or unspecified one: Some person may object. 2. certain (used with plural nouns): Some days I stay home. 3. unspecified in number, amount, degree, etc.: to some extent. 4. unspecified but considerable in number, amount, degree, etc.: We talked for some time. 5. Informal. remarkable of its type: That was some storm. pron. 6. certain persons, individuals, instances, etc., not specified: Some think he is dead. 7. an unspecified number, amount, etc., as distinguished from the rest or in addition: He paid a thousand dollars and then some. adv. 8. approximately; about: Some 300 were present. 9. to some degree or extent: I like baseball some. [before 900; Middle English (adj. and pronoun); Old English sum orig., someone, c. Old Frisian, Old Saxon, Old High German sum, Old Norse sumr, Gothic sums] -some1 , an adjective-forming suffix, now unproductive, with the meanings ?like,? ?tending to?: burdensome; quarrelsome. [Middle English; Old English -sum, c. Old Frisian -sum; akin to Old Saxon, Old High German -sam, Old Norse -samr, Gothic -sams] -some2 , a collective suffix used with numerals: threesome. [Middle English -sum, Old English sum some (pronoun)] -some3 , a combining form used in the names of structures or regions of a cell (chromosome; ribosome), chromosomes (autosome), or organisms having the form specified by the initial element (schistosome; trypanosome). [