plural of transitive set

(set theory) Any set X such that for any x ∈ X, if y ∈ x then y ∈ X; equivalently, such that if x ∈ X and x is not an urelement then x ⊆ X.

plural of breakfast set

The china or other ware used for serving and eating breakfast.

plural of set theory

Third-person singular simple present indicative form of pre-set

(transitive) To startle or shock; to render (someone) confused or disconcerted.

Third-person singular simple present indicative form of set aback

To begin a chase or hunt for (someone or something).

(mathematics) A family of sets sharing no elements in common; sets whose intersection is the empty set.