Noun baby (plural babies) A very young human being, from birth to a couple of years Any very young animal, especially with vertebrates, although many species also have specific names, such as kittens for baby cats, puppies for baby dogs, or chicks for baby birds A term of endearment for a girlfriend or boyfriend A pet project or responsibility <"the annual report has been my baby since September"> Related terms a big baby, an adult that acts childish a baby doll, a non-living model of a baby Translations Breton: babig m -ed, poupig m -ed Bulgarian: бебе n Dutch: baby m, zuigeling m Esperanto: bebo Finnish: vauva French: bébé German: Kleinkind n, Baby n Interlingua: baby, bebe Japanese: 赤ちゃん (赤ちゃん;akachan) Korean: 아기 (agi) Spanish: bebé m, nene m Volapük: cilil,sügäb See also a child (including babies, but includes up to age 18, or longer) an infant (an even earlier age) a toddler (the next stage of development)