fetus (unborn) -> infant (< 1 year) -> toddler (between 1 to 2 years) -> kid (before puberty)-> teenager (after puberty but < 19 years) -> young adult (between 19 to 25 years) -> simply called adult?? -> middle aged person( 40-60) -> senior citizens?? -> body (dead Emotion: stick out tongue)

Could someone help me in verifying my understanding of names of different age groups? Where in the timeline should I fit 'adolescent', 'baby', 'child', 'grown-up'?
There aren't really any set transition points apart from teenager, which strictly applies to all of the ages ending in 'teen' so from thirteen to nineteen. Puberty has nothing to do with it.

I'd say a child becomes a toddler when it starts to walk, before that it is a baby. Then child from about 3 or 4 years old (kid is slang) but that goes on to overlap with young teenagers. I'd say a 14 year old is both a child and a teenager. Young adult - this gets used to describe maybe 16-22 ish year olds. Adults - in theory everybody over 18, but generally the older teenagers aren't quite seen as full adults. Middle age - that's debateable! No-one likes being called middle aged so it is often 'your age+ another ten years' Emotion: smile. But personally, I'd say roughly age 45-60. Words for 'older people' are quite difficult as some of them are seen as offensive in some way (you see how I used 'older people' - that is the UK's PC phrase now for people over 60). Senior citizens is another option (sounds a bit more American to me). 'Elderly' is a word you will hear a lot but older people hate it as it includes ideas of frailness and helplessness.

Adolescent - going through puberty (roughly) so tends to coincide a lot with teenager. Probably 12-16 or so. As soon as they start changing from 'kids' they are adolescents. Grown up - this is just a child's word for adult.
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Nona, thanks for the detailed explanation! Now, I have a good idea when to use what.
Age distinctions are often something like 20 and older/over or younger/under. Currently we also hear "60 and better".
Hi there stanger

Adolescent is a stage not a age group anywhere it normally happens at the age of 15 to 19

Baby is an infant

Child is a toddlers but as for mothers they will always call their children "child" until they die because even when they've got children in their mom's eyes they are still children.

Grown up is 19 to 25 that means he/she is now a big boy/girl he/she can take care of him/herself, they can make their own decisions without their parents's input and they can face any challenges that comes their way nomatter how big or dangerous is it.


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Children upto 9 years of age

Adolescents 10-19 years

Adults 20-45 years

Middle age 46-60 years

Old > 60
Fetus (Unborn), Newborn (Birth - 1 month), Baby (1 month and 1 day - 2 years), Toddler (3 - 5), Kid (6 - 9),
Pre-Teen (10 - 12), Teenager (13 - 17), Young Adult (18 - 20), Adult (21 - 39), Young Middle-Aged Adult (40 - 49),
Middle-Aged Adult (50 - 54), Very Young Senior Citizen (55 - 64), Young Senior Citizen (65 - 74),
Senior Citizen (75 - 84), Old Senior Citizen (85+) Emotion: smile
senior citizen(from 60 up)
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baby- 0-2
young mom-25-35
old mom-45-55
young grandma-55-65
old grandma-75-85
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