solid nedir? solid nedir? Of definite shape and volume; not liquid or gaseous.Firm or compact in substance.Not hollowed out: a solid block of wood. Being the same substance or color throughout: solid gold. Mathematics Of or relating to three-dimensional geometric figures or bodies.Having no gaps or breaks; continuous: a solid line of people. Of good quality and substance: a solid foundation. Substantial; hearty: a solid meal. Sound; reliable: solid facts. Financially sound.Upstanding and dependable: a solid citizen. Written without a hyphen or space. For example, the word software is a solid compound.Printing Having no leads between the lines.Acting together; unanimous: a solid voting bloc. Slang Excellent; first-rate.A substance having a definite shape and volume; one that is neither liquid nor gaseous.Mathematics A geometric figure having three dimensions.As a whole; unanimously: The committee voted solid for the challenger. Without a break or opening; completely or continuously: The theater was booked solid for a month.