Sum′mer.
1. (Carpentry.) A horizontal beam or grinder. A summer-tree. a. The lintel of a doorway. b. A floor timber receiving the ends of the joists and supporting the floor or the ceiling, as the case may be. c. A beam resting on pillars, as in the case of a shop front, and supporting the superincumbent wall with which its front face is flush. Called a breast-summer.
2. (Masonry.) The first stone or beam laid over a column or beam. A lintel.