in·fant (?n?f?nt)n.1. A child in the earliest period of life, especially before he or she can walk.2. Law A person under the legal age of majority; a minor.3. A very young nonhuman mammal, especially a primate.adj.1. Of or being in infancy.2. Intended for infants or young children.3. Newly begun or formed: an infant enterprise.[Middle English, from Old French enfant, from Latin ?nf?ns, ?nfant-, from ?nf?ns, not able to speak, young : in-, not; see in-1 + f?ns, present participle of f?r?, to speak; see bh?- 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.infant (??nf?nt) n1. a child at the earliest stage of its life; baby2. (Law) law another word for minor103. (Education) Brit a young schoolchild, usually under the age of seven4. a person who is beginning or inexperienced in an activity5. (modifier) a. of or relating to young children or infancyb. designed or intended for young childrenadj6. in an early stage of development; nascent: an infant science or industry. 7. (Law) law of or relating to the legal status of infancy[C14: from Latin inf?ns, literally: speechless, from in-1 + f?r? to speak] ?infant?hood nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014in?fant (??n f?nt) n. 1. a child during the earliest period of its life, esp. before it can walk; baby. 2. Law. a person below the age of majority; minor. 3. a beginner, as in experience or learning; novice. 4. anything in the first stage of existence or progress. adj. 5. of or pertaining to infants or infancy. 6. being in infancy. 7. being in the earliest stage. [1350?1400; Middle English enfaunt