baby

ba‧by plural babies [countable]

1

young child

a very young child who has not yet learned to speak or walkCOLLOCATIONS 
have a baby (=give birth to a baby)give birth to a baby (=used when you are talking about the act of childbirth)be expecting a baby (=be pregnant)deliver a baby (=help a woman to give birth to a baby)newborn/new babypremature baby (=a baby that is born too early)unborn baby (=a baby still inside its mother)baby boy/girlbaby son/daughterbaby brother/sister

• The baby is crying.
• Julie's second baby was born when they lived in Washington.
• She gave birth to a baby on Thursday.
• It's hard work moving house when you're expecting a baby.
• Dr Coleman has delivered hundreds of babies.
•  How do you recognize pain in a newborn baby?
• premature babies needing special medical care
•  Jane had a baby boy this morning.
•  What do you think of your new baby sister?
•  the effects of alcohol on the unborn baby
• ➔ test-tube baby
• 2

  young animal

  a very young animal:
• baby birds
• 3

  vegetable

  a type of vegetable which is grown to be much smaller than usual or is eaten before it has grown to its normal size:
• baby carrots
• baby sweetcorn
• 4

  youngest

  a younger child in a family, often the youngest:
• Clare is the baby of the family.
• 5

  woman

  spoken
• a) used to address someone that you love:
• • Relax baby, we're on holiday.
• b) not polite used to address a young woman that you do not know
• 6

  silly person

  someone, especially an older child, who is not behaving in a brave way:
• Don't be a baby!
• 7

  responsibility

  something special that someone has developed or is responsible for:
• Don't ask me about the building contract - that's Robert's baby.
• 8

  thing

  informal something, especially a piece of equipment or a machine, that you care about a lot:
• This baby can reach speeds of 130 miles per hour.

• ➔ throw the baby out with the bathwater

   at throw1 (37)

Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.