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The Collaborative International Dictionary of English v.0.48 (gcide)

Contusion \Con*tu"sion\ (k[o^]n*t[=u]"zh[u^]n), n. [L. contusio:
cf. F. contusion.]
1. The act or process of beating, bruising, or pounding; the
state of being beaten or bruised.
[1913 Webster]

2. (Med.) A bruise; an injury attended with more or less
disorganization of the subcutaneous tissue and effusion of
blood beneath the skin, but without apparent wound.
[1913 Webster]