At around what age have you found children understand the word "No"

[Supernanny19]

Just curious to the question above - clearly children all develop at different stages. However, just want to see the average age. Thanks all.

at 8mths my dc was crawling and would go for db dvd collection/wide screen tv etc and would get told no and knew what it meant and would stop

though my 4yr also knows what no means though doesnt always listen

No as a word, rather than as a tone of voice? I think around 18 months. Before then they know it more as a tone I feel.

My 19 month old definitely knows what no means and has done for a few months. She does choose to ignore it most of the time however!

My ds is one year and understands 'no' but he probably understands more the tone of voice in which I say it.

DD just turned one and has understood 'no' for a couple of months. She usually responds with a cheeky grin I try to tell her why she can't do something rather than just saying 'no' eg when she's after the cats' bowl (which she always is) I say 'no, dirty'. Not sure if it's a tone of voice thing with DD or not, she follows other simple instructions (point to the cat, go and get teddy etc) so maybe she does understand the word and just chooses to ignore it

understands - around 12-18 months

listens........variable

One 9mo I looked after understood the tone and by the time she as 11months understood the word as well because I remember not using the very firm no-don't-touch tone one time she motioned for more cheese and I just said 'no, no more' without any body language or tone and she obviously understood (and looked very resigned!)

Others have understood the word at just over a year but the tone much earlier.

Most of the bubbas I have looked after understood the tone at around 9-12 months and the word at 12-18 months (but most of them laughed/ignored still )

Can vary lots - my DD (youngest child) understood it before she was 12 months, but my DS was around 18-22 months.

tone 9 to 12 months, listen maybe 18,19!!