English

Definition of skull and crossbones noun from the Oxford Advanced Learner's Dictionary

 

skull and crossbones

 noun
noun
BrE
 
; NAmE
 
[singular]
 
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a picture of a human skull above two crossed bones, used in the past on the flags of pirate ships, and now used as a warning on containers with dangerous substances inside
See the Oxford Advanced American Dictionary entry: skull and crossbones