1. a long surfboard, typically 8 to 10 feet or longer, designed for easier paddling and stability in smaller waves
Usage: common in surfing
2. a skateboard that is longer than a standard skateboard, used for cruising, downhill riding, or distance travel
Usage: common in skateboarding

Examples

• She paddled out on her longboard to catch the small morning waves.
• Beginners often find longboards easier to balance on than shortboards.
• He uses a longboard for cruising around town rather than doing tricks.
• The longboard's extra length provides more flotation in the water.
• Many surfers prefer longboards for their classic style and smooth rides.
• Longboarding down the hill requires good balance and control.