extension in Russian

A part of a building that has been added onto the original.

(weightlifting) An exercise in which an arm or leg is straightened against resistance.

(computing) Ellipsis of file extension.

(ring theory, of an ideal in the domain of a ring homomorphism) The ideal in the codomain generated by the image of the given ideal under the given homomorphism.

(ring theory, of an ideal in the domain of a ring homomorphism) The ideal in the codomain generated by the image of the given ideal under the given homomorphism.