n. The grouping or juxtaposition of things, especially words or sounds.n. Such a specific grouping.n. The statistically significant collocation of particular words in a language.n. A method of determining coefficients in an expansion so as to nullify the values of an ordinary differential equation at prescribed points.n. A service allowing multiple customers to locate network, server, and storage gear, connect them to a variety of telecommunications and network service providers, with a minimum of cost and complexity.