Adjective. 1. of comparatively great physical weight or density; "a heavy load" "lead is a heavy metal" "heavy mahogony furniture" 2. unusually great in degree or quantity or number; "heavy taxes" "a heavy fine" "heavy casualties" "heavy losses" "heavy rain" "heavy traffic" 3. of the military or industry; using (or being) the heaviest and most powerful armaments or weapons or equipment; More @Wikipedia
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