a long upholstered piece of furniture for several people to sit on

I sat in an armchair and they sat on the couch

express (something) in language of a specified style

the assurances were couched in general terms

lay down

two fair creatures, couched side by side in deepest grass

lower (a spear) to the position for attack

To arms! cried Mortimer, and couch'd his quiv'ring lance

treat (a cataract) by pushing the lens of the eye downwards and backwards, out of line with the pupil

cataracts, when simple, are to be couched

there were few problems of double vision in patients who had been couched for cataracts

(in embroidery) fix (a thread) to a fabric by stitching it down flat with another thread

gold and silver threads couched by hand

a coarse grass with long creeping roots, which can be a serious weed in gardens