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Definition of Tubeless
1. Noun. Pneumatic tire not needing an inner tube to be airtight. 
2. Adjective. Of a tire; not needing an inner tube.
Antonyms: Tubed
Definition of Tubeless
1. having no tube [adj]
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1. Noun. Pneumatic tire not needing an inner tube to be airtight. 
1. having no tube [adj]