1. (adj)neonate, newborn, newborn infant, newborn baby a baby from birth to four weeks Synonyms: newborn, newborn baby, neonate, newborn infant Antonyms: old
2. (adj)newborn recently born Synonyms: new-sprung(a) Antonyms: old
3. (adj)newborn, new-sprung(a) having just or recently arisen or come into existence Antonyms: old