1. A sharp, pointed peak of rock or ice, especially in mountainous regions.
Usage: mountaineering; from French
2. A slender needle-like structure or object.
Usage: technical; rare in general English

Examples

• The climbers approached the aiguille with caution as the weather deteriorated.
• Mont Blanc is surrounded by several dramatic aiguilles that attract experienced mountaineers.
• The aiguille rose sharply from the glacier, its icy surface glinting in the sunlight.
• From the valley, the aiguilles appeared as thin needles piercing the sky.
• The guide pointed out the distinctive aiguille that marked the route to the summit.