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Webster 1913 Edition

Adj.

Tending to, or involving, retaliation; retaliative; as retaliatory measures.

Adj.

Returning like for like; as retaliatory measure; retaliatory edicts.

retaliatory ‎(comparative more retaliatory, superlative most retaliatory)

Relating to or part of a retaliation.
The hostile forces were at an impasse; neither could attack with enough force and still defend against the retaliatory counterattack.

relating to or part of a retaliation