Trilinear may refer to:
Trilinear filtering, a method in computer graphics for choosing the color of a texture Trilinear form, a type of mathematical function from a vector space to the underlying field Trilinear interpolation, an extension of linear interpolation for interpolating functions of three variables on a rectilinear 3D grid Trilinear map, a type of mathematical function between vector spaces Trilinear coordinates Trilinear polarity, in geometry