In America, a flat is an apartment. You might call that person an apartment dweller, a tenant, a renter, or in the case of a coop, they would be called the owner.
An apartment. Interestingly, the UK "1st floor" is the American "2nd floor." The American "first floor" is the UK "ground floor."
Americans typically refer to a flat as an "apartment" or a "condo."
halls of residence student flat
Did you mean "I live in a flat"? If so, then it's "Vivo en un apartamento." It's a cognate with the American-English word for flat -- apartment.
they lived in adobe villages on top flat mesas
no
Say you live on a mountain, it would be harder to live on the mountain than flat land. It would be harder because mountains are rough and bumpy, unlike flat land, which is--well, flat. So it would be easier to make your house, live in your house, take care of your house, etc.
I live in a flat translates asIch wohne in einer WohnungorIch lebe in einer Wohnungbut most native speakers would probably just say Ich habe eine Wohnung (I have a flat)
You would say "J'habite dans un appartement" in French.
I would call them islanders.
Flat has more than one meaning, it could mean level, without lumps and bumps, such as flat ground, a flat surface or flat feet, it is also a serving platter used in catering or restaurants, and a Flat is what we British call a place to live or an apartment, for example "I live in a Flat above a shop" or "a block of Flats".The word 'flat' is also used when someone is singing a note a bit lower that it should be, in this case we call it a 'flat note'. The term 'flat' however, in music, also means to lower a natural note in most cases by a semitone. For example, we have the note E and the note just below E is called 'E flat', which means it is the lowered form of the original note.
You would call them bay gulls or bay seagulls.
call American airlines and get on with it!