Lying open; open; expanded.Specifically— In botany, spreading; open; either widely spreading or diverging widely from an axis.In zoology, patulous; open, as by the size of an aperture, the shallowness of a cavity, etc.Manifest to all; unconcealed; evident; obvious; conspicuous.Open to the perusal of all: as, letters patent. See letter.Appropriated by letters patent; secured by law or patent as an exclusive privilege; restrained from general use; patented.Synonyms Plain, obvious, palpable, unmistakable, glaring, notorious.n. An official document, sometimes called letters patent (which see, under letter), conferring or granting a privilege; also, the privilege so granted: as, a patent of nobility; a patent conferring the right to engage in a particular trade or pursuit, maintain a place of amusement, or the like, usually to the exclusion of others.n. Specifically— A letter of indulgence; an indulgence; a pardon.n. The grant by a government to the author of a new and useful invention, or to his assigns, of the exclusive right of exploiting that invention for a specified term of years; also, the instrument or letters by which a grant of land is made by a government to a person or corporation.n. An invention; a thing invented: as, the machine is a new patent.n. A region or tract of land granted by letters patent; a concession.To grant by patent; make the subject of a patent; grant an exclusive right to by letters patent.To obtain a patent upon; obtain an exclusive right in by securing letters patent.n. A Middle English form of patent.