To command or instruct with authority; to suspend or restrain. One may be enjoined or commanded by a court either to do a specific act or to refrain from doing a certain act. See injunction.
EXAMPLE: Plastics Company has been disposing of its waste products in an adjacent river for over a decade. Environmentalists finally determine that some of the liquid waste contains a deadly carcinogen. A court enjoins (ie, forbids) Plastics from using the river for disposal based on the environmentalists’ proofs.
Source: Barron's Dictionary of Legal Terms, Steven H. Gifis, 5th Edition; © 2016