Md. Rule 15-501
Rule 15-501. Injunctions—Definitions
The following definitions apply in the rules in this Chapter:
(a) Injunction. “Injunction” means an order mandating or prohibiting a specified act.
(b) Preliminary Injunction. “Preliminary injunction” means an injunction granted after opportunity for a full adversary hearing on the propriety of its issuance but before a final determination of the merits of the action.
(c) Temporary Restraining Order. “Temporary restraining order” means an injunction granted without opportunity for a full adversary hearing on the propriety of its issuance.