n. A small fine brush, such as may be used by a painter in laying on paints; technically, a special type of pointed brush the hairs of which are held by a quill ferrule with a wooden handle which is often detachable.n. Figuratively, the art of painting; also, skill in painting or delineation; style of delineation.n. An instrument for marking, drawing, or writing, formed of graphite, colored chalk, or a material of similar properties, and having a tapering end; specifically, a thin strip of such substance in closed in a cylinder of soft wood or in a metal case with a tapering end.n. Writing done with a pencil, as distinguished from that done with ink: as, a note written in pencil.n. In optics, all the rays of light which diverge from or converge to a given point.n. In geometry, the figure formed by a number of lines which meet in one point.n. In zoology, a tuft or little brush, as of hair or feathers. Also called penicillium.n. See the adjectives.To paint or draw; execute with a pencil or in pencil; mark with penciling or as with a pencil: as, finely penciled eyebrows.To write with a pencil.n. See pencel.In medicine, to apply a remedy to (an inflamed spot, etc.) with a fine brush: as, to pencil a wound with lunar caustic.