symp·tom (s?m?t?m, s?mp?-)n.1. An indication of a disorder or disease, especially a subjective one such as pain, nausea, or weakness.2. A characteristic sign or indication of the existence of something else: drought and erratic rainfall as symptoms of climate change.[Middle English sinthoma, symptom of a disease, from Medieval Latin sinth?ma, from Late Latin sympt?ma, from Greek sumpt?ma, sumpt?mat-, a happening, symptom of a disease, from sumpiptein, sumpt?-, to coincide : sun-, syn- + piptein, to fall; see pet- in Indo-European roots.]symp?tom·less adj.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.symptom (?s?mpt?m) n1. (Medicine) med any sensation or change in bodily function experienced by a patient that is associated with a particular disease. Compare sign92. any phenomenon or circumstance accompanying something and regarded as evidence of its existence; indication[C16: from Late Latin sympt?ma, from Greek sumpt?ma chance, from sumpiptein to occur, from syn- + piptein to fall] ?symptomless adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014symp?tom (?s?mp t?m) n. 1. any phenomenon or circumstance accompanying something and serving as evidence of it. 2. a sign or indication of something. 3. a phenomenon that arises from and accompanies a particular disease or disorder and serves as an indication of it. [1350?1400; Middle English