noting or pertaining to a speed less than that of sound in air at the same height above sea level.
being, having, or travelling at a velocity below that of sound: a subsonic aircraft
Having a speed less than that of sound in a designated medium, usually air; having a velocity less than Mach 1. Compare hypersonic, supersonic, transonic.
noun 1. a monarch; a king, queen, or other supreme ruler. 2. a person who has supreme power or authority. 3. a group or body of persons or a state having sovereign authority. 4. a gold coin of the United Kingdom, equal to one pound sterling: went out of circulation after 1914. adjective 5. belonging […]
noun 1. a smaller space within a main area that has been divided or subdivided: The jewelry shop occupies a subspace in the hotel’s lobby. 2. Mathematics. a subset of a given space. Also called linear manifold. a subset of a vector space which is itself a vector space. a subset of a topological space, […]
noun, Mathematics. 1. relative topology. relative topology noun, Mathematics. 1. a topology of a subset of a topological space, obtained by intersecting the subset with every open set in the topology of the space.