Leash/liːʃ/ Definition 1 of 2Pro Tip 1/3Literal Usage Used for actual straps or cords controlling animals, not metaphorically for humans. Please put your dog on a leash in the park. Pro Tip 2/3Safety Tool A leash ensures safety for the pet and others by preventing unexpected behavior. A sturdy leash can keep your pet safe on busy streets. Pro Tip 3/3Legal Requirement In many places, leashes are required by law for walking pets in public. Sign at the park entrance: 'All dogs must be leashed.'