K-space

K-space or k-space can refer to:


 * Another name for the spatial frequency domain of a spatial Fourier transform
 * Reciprocal space, containing the reciprocal lattice of a spatial lattice
 * Momentum space, or wavevector space, the vector space of possible values of momentum for a particle
 * k-space (magnetic resonance imaging)
 * Another name for a compactly generated space in topology
 * K-space (functional analysis) is an F-space such that every twisted sum by the real line splits
 * K-Space (band), a British-Siberian music ensemble