Definition of "unlined" []

• Without lining; without liner (adjective)
• Unmarked by lines, especially of the skin (adjective)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "His cheeks are full and his skin unlined; he looks far younger than his 67 years."
• "Plus, electronics sometimes wind up sitting around in unlined pits, where chemicals can leech into soil and groundwater, poisoning the surrounding areas."
• "McGrath points out that the disposal site is in a 100 year floodplain and is "unlined," which allows toxins from the coal ash to leak into the area's groundwater and potentially into someone's drinking water downriver."