(zoology) The natural hierarchy of social status and dominance occurring in a group of birds.

(cricket) the batsmen who bat in the first few positions

To call a place of service and order food, or other goods, delivered to one's own location.

A system of commerce in which one orders goods from a remote store which are then shipped by mail.

(set theory, order theory, of a set) Equipped with a partial order; when the partial order is specified, often construed with by.

(set theory, order theory) A binary relation that is reflexive, antisymmetric, and transitive.

(cricket, baseball, softball) The sequence in which a side's batsmen go in to bat.

(cricket) The batsmen, constituting the tail, who bat last - roughly in positions 8 to 11.

(originally US, idiomatic) A big job; a difficult challenge.

(set theory) An object containing exactly two elements in a fixed order, so that, when the elements are different, exchanging them gives a different object. Notation: (a, b) or ⟨a,b⟩.