pig·ment (p?g?m?nt)n.1. A substance used as coloring.2. Dry coloring matter, usually an insoluble powder, to be mixed with water, oil, or another base to produce paint and similar products.3. A substance, such as chlorophyll or melanin, that produces a characteristic color in plant or animal tissue.tr.v. pig·ment·ed, pig·ment·ing, pig·ments To color with pigment.[Middle English, spice, red dye, from Latin pigmentum, from pingere, to paint; see peig- in Indo-European roots.]pig?men·tar?y (p?g?m?n-t?r??) 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.pigment (?p??m?nt) n1. (Biology) a substance occurring in plant or animal tissue and producing a characteristic colour, such as chlorophyll in green plants and haemoglobin in red blood2. (Dyeing) any substance used to impart colour3. (Dyeing) a powder that is mixed with a liquid to give a paint, ink, etc[C14: from Latin pigmentum, from pingere to paint] ?pigmentary adjCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014pig?ment (?p?g m?nt) n. 1. a dry insoluble substance, usu. pulverized, that when suspended in a liquid vehicle becomes a paint, ink, etc. 2. a coloring matter or substance. 3. any of various biological substances, as chlorophyll and melanin, that produce color in the tissues of organisms. v.t. 4. to color; add pigment to. v.i. 5. to acquire color. [1350?1400; Middle English