(electrical engineering) On a Karnaugh map: a set of 1's (whose quantity is a power of two) which are related by adjacency (i.e., the set is connected, if the Karnaugh map is considered to be a graph which "wraps around" its edges, like a torus; and, all elements of the subgraph induced by the set have the same degree). Equivalently (in terms of Boolean algebra), a product term which, when true, always implies that the given Boolean function is true.
