Used attributively before another noun (e.g., "smile lines")
Definitions
Relating to or characteristic of a smile; occurring as the result of smiling. She was worried about the deepening smile lines around her eyes.
Attributive use before another noun to denote relation to a smile or smiling
Definitions
Used attributively before a noun to indicate connection with or characteristic of a smile or smiling. Smile lines formed at the corners of his eyes.