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tr.v. en·grained, en·grain·ing, en·grains
[Middle English engreinen, to dye with cochineal or kermes, from Old French engrainer : en-, causative pref.; see en-1 + graine, grain; see grain.]
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.
a variant spelling of ingrain
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
in•grain(v. ɪnˈgreɪn; adj., n. ˈɪnˌgreɪn)
1. to implant or fix deeply and firmly, as in the nature or mind.adj.
2. ingrained; firmly fixed.
3. (of fiber or yarn) dyed in a raw state, before being woven or knitted.
4. made of fiber or yarn so dyed: ingrain fabric.n.
5. yarn, wool, etc., dyed before manufacture.Also, engrain (for defs. 1,2).
[1760–70; orig. phrase (dyed) in grain]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Past participle: engrained
Collins English Verb Tables © HarperCollins Publishers 2011