flatmate /ˈflætmeɪt/ noun2 •A person with whom one shares a flat.“So, it would probably [be] best if we could find another flatmate and go for a flat of five, and if old Chip does pull out, at least we can then drop down to a flat of four. What do you reckon?” — 2007 •(UK, Ireland) A person with whom one shares any rental dwelling, not necessarily a flat.One night, one of the flatmates (the one who owned the house) was ranting and raving all night about her girlfriend. — 2003 formsflatmates
