An infant is a baby. When you were an infant, you weren't able to walk, talk, or feed yourself (but you had a pretty mean burp).

Infant is most often used for a very young human, but you can also use it to talk about animal babies. People are considered infants from the moment of birth until approximately one year old, an age when many babies are starting to walk and talk. At this point, they're commonly called toddlers instead of infants. The Latin root is infantem, which as a noun means "babe in arms," and as an adjective "unable to speak."

Definitions of infant
  1. noun
    a very young child (birth to 1 year) who has not yet begun to walk or talk
    synonyms: babe, baby
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    blue baby
    an infant born with a bluish color; usually has a defective heart
    a sweet innocent baby
    abandoned infant, foundling
    a child who has been abandoned and whose parents are unknown
    an infant who is sponsored by an adult (the godparent) at baptism
    neonate, newborn, newborn baby, newborn infant
    a baby from birth to four weeks
    nurseling, nursling, suckling
    an infant considered in relation to its nurse
    papoose, pappoose
    an American Indian infant
    test-tube baby
    a baby conceived by fertilization that occurs outside the mother's body; the woman's ova are removed and mixed with sperm in a culture medium - if fertilization occurs the blastocyte is implanted in the woman's uterus
    war baby
    conceived or born during war
    a female godchild
    a male godchild
    liveborn infant
    infant who shows signs of life after birth
    low-birth-weight baby, low-birth-weight infant
    an infant born weighing less than 5.5 pounds (2500 grams) regardless of gestational age
    postmature infant
    infant born after 42 weeks of gestation; usually shows signs of placental insufficiency
    preemie, premature baby, premature infant, premie, preterm baby, preterm infant
    an infant that is born prior to 37 weeks of gestation
    SGA infant, small-for-gestational-age infant
    an infant whose size and weight are considerably less than the average for babies of the same age
    stillborn infant
    infant who shows no signs of life after birth
    term infant
    infant born at a gestational age between 37 and 42 completed weeks
    type of:
    child, kid
    a human offspring (son or daughter) of any age
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