They absolutely do have language. It's a language based more around scents and body rather than words and noises, but it is most certainly a language.
It's not a complex language in the sense that any linguist would care about. Hell, it's arguable they don't even confer information in a way the ant understands; it's all pretty basic physiological reaction. It's "communication" in the same sense as someone "communicating" with you by injecting you with psychoactive drugs.
At any rate, I obviously wasn't talking about simple "individuals can cause other individuals to respond to stimuli in some form or another" "communication". I was referring to complex, abstract language. Ants instinctively leaving behind scent trails that other ants instinctively follow is not the same thing.
Also; if you want to argue about 'Civilisation' meaning 'of pertaining to Citizens', argue with the dictionary, not me.
You're seriously counting on a basic dictionary to give a highly-precise and academic definition of an extremely nebulous concept? Yeah, good luck with that.
Also, you're wrong anyway, even if we
are going by simple dictionary definitions instead of actually consulting some sort of academic body of knowledge.
An advanced state of intellectual, cultural, and material development in human society, marked by progress in the arts and sciences, the extensive use of record-keeping, including writing, and the appearance of complex political and social institutions.
Of course, there are some other definitions as well, because "civilization" isn't like "chair". It's not one of those words you can trivially define in a way that'll satisfy everyone all the time in a noncontroversial fashion that's suitable and unquestionable for all arguments.
Of course, none of the definitions consist of "of pertaining to citizens", which is both grammatically incorrect to begin with and wouldn't be the proper definition of a noun, as it's in an adjectival form.
and they do more than growing plants, they cut plants and take them to their nest, then they grow fungus!
That's still less complex than agriculture, not to mention that it's also entirely instinctive, whereas civilization is a cultural thing.
and about complext thought, i never read anywhere that it was a requirement to be civilized
Even some apes and other animals have aspects of culture. Ants have none, because it's kind of hard to transmit ideas to others when you can't actually think of or communicate them.