A settee is a long comfortable seat with a back, and usually with arms, for more than one person — what most learners already call a sofa. It is a British living-room word, a little old-fashioned now; younger people more often say sofa. Couch is the word many Americans use. Though actually, Britain has long argued about sofa, settee and couch, and they do not really name three different pieces of furniture so much as different families' habits. It is informal-to-neutral home English, not a design-school term. In Taiwan you will just say 沙發, and everyone will know what you mean.

沙發（有靠背、多半有扶手、可坐兩人以上）。英式、略舊；台灣一律說沙發。