penthouse /ˈpɛnt(h)aʊs/noun 4verb 1forms 3 noun4 •An apartment or suite found on an upper floor, or floors, of a tall building, especially one that is expensive or luxurious with panoramic views.Night of January 16th is the story of a woman on trial for pushing her wealthy boss-lover from a Manhattan penthouse. — 1995 •Any of the sloping roofs at the side of a real tennis court. •A structure or annexe (especially one with a sloping roof) extending from the side of a building, sometimes as protection from the weather.At length, recommending himself to God, he let go one end of his cord, and suffered himself to fall down upon an old shed or penthouse, which, with the weight of his body, fell in with great noise. — 1826 •(no longer used) Something forming a shelter or canopy over something; an awning, shelter, etc.The proboscis […] is doubled up by means of the joint, and in that position lies secure under a scaly penthouse. — 1802 verb1 •To provide with a penthouse, shelter by means of a shed sloping from a wall, or anything similar. formspenthoused · penthousing · penthouses