Where do you draw the line?

[tayiie]

Since the terms aren't something I'm familiar with I would like to know, where do you draw the line between infant, baby, toddler, adult kid and teenager?

[Elfy]

18-19 is adult for me rather than teenager.

Adult kid is maybe 5-18 but not sure about the rest.

[Apache Raccoon]

Baby/infant- 0-1 years old (maybe 2)

Toddler- 2-4

AK- 5-12

Teen 13-17

[Little BabyDoll Christine]

DPf used the following pretty much

0-3 Baby which meant infant and toddler

4-6 pre-schooler

7-10 Grade schooler

12-14 Jr. High

15-17 High school

or

[WakkoWannaBe]

I've caught myself referring to undergraduate students as "kids."

"Kid" can sometimes be derogatory, but I never mean it like that. Most undergrads are just like 5-7 years younger than me, but that's such a big difference in some aspects.

[Dubious]

I think its wrong to call 18 and 19 for teenagers, even though "teen" comes from the fact that the numbers/ages have "teen" in them, its mostly used in the porn industry and when joking with them "your not an adult, you still

[PetahPetah]

i thought i'd read, maybe in dd, that "adult kid" referred to a legal-adult who does regression and acts like a child, or else is emotionally immature and "childish."

[Kaliborio]

They overlap as far as I'm concerned.

I think of 'infant' and 'baby' as synonyms but if I had to pick I would say 'infant' is only up to about 3 months.

'Baby' is up to 2 and a half years old in my opinion.

'Toddler' is 2 to 3 and a half years old.

Adult kids usually regress to somewhere between 5 and 10 in my experience.

Actual 'kids' are 3 to 12 years old in my opinion.

'Teens' are, as you say, 13 to 19. Arguably 'teenagerhood' goes up to 21 in places where that is the age of majority.