Any of a range of European abbreviations for food additives used on labels. / (Britain, Ireland, informal) Any such additive, often regarded as undesirable.

(usually used attributively) A simple drawing exercise, intended especially for children, consisting of a line drawing that divides the artwork into distinct spaces, the intended color of each indicated by a number and referenced from a key.

To complete such an exercise; to carry out such a technique by filling in each space with the appropriate color.

(mathematics) a positive integer

(idiomatic) First; foremost; best, often used after its headword.

The most important person, the one who is in charge. / Someone who is top of a ranking, who is ranked first. / Oneself, being considered foremost, as by an egoist.

A number used without application to things, e.g. 6, 8, 10; but when applied to anything, e.g. 6 feet, 10 men, it becomes concrete.

(graph theory) The smallest number of colours needed to colour a given graph (i.e., to assign a colour to each vertex such that no two vertices connected by an edge have the same colour).

Asks the interlocutor to give their phone number for subsequent communication.

(physics) The number of neutrons or protons in nuclei which are required to fill the major quantum shells, and thus produce exceptionally stable nuclei: 2, 8, 20, 28, 50, 82 and 126.