Loch/lɑːk,lɑːx/ Definition 1 of 2Pro Tip 1/3Scottish Geography Often used when discussing Scottish landmarks and geography. Loch Lomond is a must-see destination in Scotland. Pro Tip 2/3Cultural Icon Lochs can be part of local legends and folklore, especially in tourist areas. Tales of the Loch Ness Monster have fascinated people worldwide. Pro Tip 3/3Not Always a Lake Loch can also refer to a sea inlet, not just lakes. Loch Fyne is known for its oysters and isn't a lake, but a sea loch.