Of, pertaining to, characteristic of, or organized along the lines of an institution. / Instituted by authority. / Elementary; rudimentary. / Arising from the practice of an institution.

Intended for purposes of instruction, for teaching.

A book, film, etc. intended to instruct.

(processed food) A potato preparation in the form of a powder or flakes, used to make mashed potato quickly and easily.

(informal) Instant.

A musician who plays two or more musical instruments at a professional level of proficiency.

(optics) The width of a fringe formed in monochromatic light.

(music) A musical instrument that produces sound by means of vibrating strings.

(music) A musical instrument in which sound is produced by blowing against an edge or by vibrating a thin piece of wood or metal known as the reed, and in which the pitch is governed by the resonant frequencies of an enclosed air column.

(law, banking, business) a legal document, as a cheque or bill of exchange, that is freely negotiable.