Definition of «to show aggression»

"To show aggression" means to express or display hostility, anger, or violent behavior towards someone or something.

She does tend to compete for attention with other pets, but does not show aggression towards other dogs. (anewstartonlife.com)
If your dog shows aggression toward people or other dogs when scared then he / she may not be appropriate for this class. (eastbayspca.org)
Some dogs show aggression when in the presence of other dogs. (thebarkbuzz.com)
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