1. a single stalk or blade of grass
Usage: often used in poetic or literary contexts
2. a single thread or fiber
Usage: archaic or dialectal

Examples

• A single brin of grass swayed in the breeze.
• The poet described the meadow as composed of countless brins.
• Each brin of the fabric was carefully woven together.
• The lawn was so fine that each brin was visible.
• She pulled a brin of grass from the ground.