(Gram.) A word or phrase that modifies another word, phrase, or sentence, usually by limiting the scope or restricting the meaning of the sentence element modified.
... importance as a factor in life and a modifier of its conditions, the machine is in every sense a new and unprecedented fact. The machine has no traditions. The only way to take a traditional stand with regard to life or the representation of life to-day, is to leave the ... — The Voice of the Machines - An Introduction to the Twentieth Century • Gerald Stanley Lee