(uncountable) The grouping or juxtaposition of things, especially words or sounds.

(countable) Such a specific grouping.

(linguistics, translation studies) A sequence of words or terms that co-occur more often than would be expected by chance (i.e., the statistically significant placement of particular words in a language), often representing an established name for, or idiomatic way of conveying, a particular semantic concept.

(mathematics) A method of finding an approximate solution of an ordinary differential equation L [ y ] = 0 {\displaystyle L[y]=0} by determining coefficients in an expansion y ( x ) = y 0 ( x ) + ∑ l = 0 q α l y l ( x ) {\textstyle y(x)=y_{0}(x)+\sum _{l=0}^{q}\alpha _{l}y_{l}(x)} so as to make L [ y ] {\displaystyle L[y]} vanish at prescribed points; the expansion with the coefficients thus found is the sought approximation.

(computing) A service allowing multiple customers to locate network, server, and storage gear and connect them to a variety of telecommunications and network service providers, at a minimum of cost and complexity.