An injunction is a court order, which restrains a party, or parties affected from doing a particular thing or in its mandatory form, require a party or parties to do a particular thing. In essence an injunction is designed to ensure that a status quo in maintained pending the hearing of a substantive action and to preserve the effectiveness of any final judgement.

Some circumstances in which injunctions are granted are to restrain trespass, to compel compliance with planning permissions, to prevent illegal picketing, to restrain passing off, to prevent breaches of contract and to freeze assets. An injunction is a discretionary remedy, which a court will grant only when satisfied that it is just and equitable to do so.