1. a rope or cable stretched from a fixed point to the ground or another object to steady or secure something (such as a tent, mast, or antenna).
Usage: also spelled guy line or guy-line; commonly used in camping, sailing, and construction

Examples

• The tent was held firmly in place by four guylines anchored to the ground.
• We tightened the guylines before the storm arrived.
• The sailboat's mast was supported by multiple guylines.
• Make sure each guyline is taut and properly secured.
• The camping guide showed us how to properly attach guylines to tent stakes.
• Without guylines, the antenna would sway dangerously in the wind.