ledge noun
ADJ. high | narrow, wide | cliff, mountain, window
VERB + LEDGE cling to The climbers were clinging to a ledge hundreds of feet above the sea. | be perched on
LEDGE + VERB go, run A narrow ledge runs across the northern face of the cliff.
PREP. along a/the ~ I felt along the ledge at the top of the door. | on a/the ~ The phone was perched precariously on the window ledge.
You can also check other dicts: ledge (English, 中文解释 ), wordnet sense, Collins Definition