infant(n = noun.person) babe, baby - a very young child (birth to 1 year) who has not yet begun to walk or talk; "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different"
is a kind of child, kid
has particulars: blue baby, cherub, abandoned infant, foundling, godchild, neonate, newborn, newborn baby, newborn infant, nurseling, nursling, suckling, papoose, pappoose, test-tube baby, war baby
Derived forms noun infancy₂, noun infancy₁

1.  A child in the first period of life, beginning at his birth; a young babe; sometimes, a child several years of age. [1913 Webster]
"And tender cries of infants pierce the ear." [1913 Webster]

2.  A person who is not of full age, or who has not attained the age of legal capacity; a person under the age of twenty-one years; a minor. [1913 Webster]
" An infant under seven years of age is not penally responsible; between seven and fourteen years of age, he may be convicted of a malicious offense if malice be proved. He becomes of age on the day preceding his twenty-first birthday, previous to which time an infant has no capacity to contract." [1913 Webster]

3.  Same as Infante. Spenser. [1913 Webster]

1.  Of or pertaining to infancy, or the first period of life; tender; not mature; as, infant strength. [1913 Webster]

2.  Intended for young children; as, an infant school. [1913 Webster]

   To bear or bring forth, as a child; hence, to produce, in general. [1913 Webster]
"This worthy motto, “No bishop, no king,” is . . . infanted out of the same fears." [1913 Webster]

infant, n.
1 a a child during the earliest period of its life. b Brit. a schoolchild below the age of seven years.
2 (esp. attrib.) a thing in an early stage of its development.
3 Law a minor; a person under 18.

Idiom:
infant mortality death before the age of one.

Etymology:
ME f. OF enfant f. L infans unable to speak (as IN-(1), fans fantis pres. part. of fari speak)

N  infant, babe, baby, babe in arms, nurseling, suckling, yearling, weanling, papoose, bambino, kid, vagitus, child, bairn, little one, brat, chit, pickaninny, urchin, bantling, bratling, elf, youth, boy, lad, stripling, youngster, youngun, younker, callant, whipster, whippersnapper, whiffet, schoolboy, hobbledehoy, hopeful, cadet, minor, master, scion, sap, seedling, tendril, olive branch, nestling, chicken, larva, chrysalis, tadpole, whelp, cub, pullet, fry, callow, codlin, codling, foetus, calf, colt, pup, foal, kitten, lamb, lambkin, aurelia, caterpillar, cocoon, nymph, nympha, orphan, pupa, staddle, girl, lass, lassie, wench, miss, damsel, demoiselle, maid, maiden, virgin, hoyden, infantine, infantile, puerile, boyish, girlish, childish, babyish, kittenish, baby, newborn, unfledged, new-fledged, callow, in the cradle, in swaddling clothes, in long clothes, in arms, in leading strings, at the breast, in one's teens.

N  weakness, debility, atony, relaxation, languor, enervation, impotence, infirmity, effeminacy, feminality, fragility, flaccidity, inactivity, anaemia, bloodlessness, deficiency of blood, poverty of blood, declension of strength, loss of strength, failure of strength, delicacy, invalidation, decrepitude, asthenia, adynamy, cachexy, cachexia, sprain, strain, reed, thread, rope of sand, house of cards, softling, weakling, infant, youth, weak, feeble, debile, impotent, relaxed, unnerved sapless, strengthless, powerless, weakly, unstrung, flaccid, adynamic, asthenic, nervous, soft, effeminate, feminate, womanly, frail, fragile, shattery, flimsy, unsubstantial, insubstantial, gimcrack, gingerbread, rickety, creaky, creaking, cranky, craichy, drooping, tottering, broken, lame, withered, shattered, shaken, crazy, shaky, palsied, decrepit, languid, poor, infirm, faint, faintish, sickly, dull, slack, evanid, spent, short-winded, effete, weather-beaten, decayed, rotten, worn, seedy, languishing, wasted, washy, laid low, pulled down, the worse for wear, unstrengthened, unsupported, unaided, unassisted, aidless, defenseless, cantilevered (support), on its last legs, weak as a child, weak as a baby, weak as a chicken, weak as a cat, weak as a rat, weak as water, weak as water gruel, weak as gingerbread, weak as milk and water, colorless, non sum qualis eram.

N  fool, idiot, tomfool, wiseacre, simpleton, witling, dizzard, donkey, ass, ninny, ninnyhammer, chowderhead, chucklehead, dolt, booby, Tom Noddy, looby, hoddy-doddy, noddy, nonny, noodle, nizy, owl, goose, goosecap, imbecile, gaby, radoteur, nincompoop, badaud, zany, trifler, babbler, pretty fellow, natural, niais, child, baby, infant, innocent, milksop, sop, oaf, lout, loon, lown, dullard, doodle, calf, colt, buzzard, block, put, stick, stock, numps, tony, bull head, dunderhead, addlehead, blockhead, dullhead, loggerhead, jolthead, jolterhead, beetlehead, beetlebrain, grosshead, muttonhead, noodlehead, giddyhead, numbskull, thickskull, lackbrain, shallowbrain, dimwit, halfwit, lackwit, dunderpate, lunkhead sawney, gowk, clod, clod-hopper, clod-poll, clot-poll, clot-pate, bull calf, gawk, Gothamite, lummox, rube, men of Boeotia, wise men of Gotham, un sot a triple etage, sot, jobbernowl, changeling, mooncalf, gobemouche, dotard, driveler, old fogey, old woman, crock, crone, grandmother, cotquean, henhussy, incompetent (insanity), greenhorn, dunce, lubber, madman, one who will not set the Thames on fire, one who did not invent gunpowder, qui n'a pas invente' la poudre, no conjuror, fortuna favet fatuis, les fous font les festinas et les sages les mangen, nomina stultorum parietibus harrent, stultorum plena sunt omnia.

abandoned infant, infant death, infant deathrate, infant feeding, infant mortality, infant mortality rate, infant prodigy, infant school, liveborn infant, low-birth-weight infant, newborn infant, postmature infant, premature infant, preterm infant, sga infant, small-for-gestational-age infant, stillborn infant, sudden infant death syndrome, term infant