1. Not having a lining or liner
   "a thin unlined jacket" 
2. Smooth, especially of skin
   "his cheeks were unlined"
   - seamless, unseamed

See also: smooth

Antonym: lined

• spitting snake
• spittle
• spittle insect
• spittlebug
• spittoon
• spitz
• Spitzbergen
• spiv
• Spizella
• Spizella arborea
• Spizella passerina
• Spizella pusilla
• splanchnic
• splanchnic nerve
• splash
• splash around
• splash-guard
• splashboard
• splashdown
• splashed
• splasher
• splashiness
• splashing
• splashy
• splat