(Canada, US) A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number.

plural of E number

(rugby) A player in the scrum, who controls the movement of the scrum, and can pick up the ball exiting the scrum; eighthman. / (cricket) The batsman who bats eighth.

To complete a painting by numbers kit / (figuratively) To perform something in the simplest way

(of a picture) Made from a painting by numbers kit. / (figuratively) By rote, without thought or creativity.

A recreation in which a board containing a picture to be painted is made up of numbered areas, each number corresponding to a colour of paint to be applied.

(Britain) Either of a pair of rectangular metal plates bearing an alphanumeric code, fixed to the front and rear of a motor car to show its identity as registered with the DVLA.

(graph theory) the number of vertices in a maximum independent set of a given graph, often denoted as 𝛼=𝛼(G)

(graph theory) the number of edges in a maximum matching, often denoted 𝜈=𝜈(G)

(graph theory) The number of vertices in a minimum vertex cover of a graph, often denoted as 𝜏=𝜏(G).