1. a person or thing that describes, portrays, or outlines something in words or images
2. a reflective or fluorescent marker placed on a road or pavement to guide traffic
Usage: chiefly North American

Examples

• The artist served as a skilled delineator of the landscape's natural beauty.
• The novelist was known as a delineator of human emotion and conflict.
• Road delineators help drivers stay in their lanes during nighttime driving.
• The delineators along the highway were reflective and easy to spot.
• As a delineator of character, the author excelled at creating memorable personalities.
• The construction crew installed new delineators to mark the work zone.