ROOF

I. noun (plural ~s) Etymology: Middle English, from Old English hrōf; akin to Old Norse hrōf ~ of a boathouse and perhaps to Old Church Slavic stropŭ ~ Date: before 12th century 1. a. the cover of a building, material used for a ~ ; ~ing , the ~ of a dwelling conventionally designating the home itself , 2. the highest point ; summit , an upper limit ; ceiling , 3. the vaulted upper boundary of the mouth, a covering structure of any of various parts of the body , something suggesting a ~: as, a canopy of leaves and branches, the top over the passenger section of a vehicle, ~ed adjective ~less adjective ~like adjective II. transitive verb Date: 15th century 1. to cover with or as if with a ~, to provide with a particular kind of ~ or ~ing, to constitute a ~ over, ~er noun