Wrong again: a very young child, especially one newly or recently born.
"his wife's just had a baby"
synonyms: infant, newborn, child, tot, little one; More
2.
informal
a young woman or a person with whom one is having a romantic relationship (often as a form of address).
"my baby left me for another guy"
adjective
1.
comparatively small or immature of its kind.
"a baby grand piano"
synonyms: miniature, mini, little, small, small-scale, scaled-down, toy, pocket, vest-pocket, midget, dwarf; More
verb