Definition of sabretooth noun from the Oxford Advanced Learner's Dictionary

 

sabretooth

 noun
(British English)(US English sabertooth)noun
BrE BrE//ˈseɪbətuːθ//
 
; NAmE NAmE//ˈseɪbərtuːθ//
 
(British English also sabre-toothed tiger)(also US English saber-toothed tiger)
 
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a large animal of the cat family with two very long curved upper teeth, that lived thousands of years ago and is now extinct