1. superlative form of thin: having the least thickness, width, or density
2. superlative form of thin: having the least body fat or weight
3. superlative form of thin: most lacking in substance or quality

Examples

• She chose the thinnest slice of cake.
• This is the thinnest paper I’ve ever seen.
• He was the thinnest runner on the team.
• The thinnest part of the ice cracked first.
• That’s the thinnest excuse you’ve given yet.
• The mountain air was thinnest at the peak.
• She applied the thinnest layer of paint possible.