Precious metals like gold or silver in bulk form, usually bars or ingots, valued by weight rather than as coins.
From Old French 'bouillon' (boiling or mint) related to 'bouillir' (to boil), referring to melted metal; the term entered English in the 1600s as trade in precious metals increased.
Gold and silver bullion is valued purely by weight and purity, which is why it's been used across cultures and centuries as a universal store of value—long before paper money, you could trade bullion anywhere because everyone trusts metal's intrinsic worth.
Complete word intelligence in one call. Free tier — 50 lookups/day.