Simple past tense and past participle of tin.(verb)
Coated, or plated with tin.(adjective)
Packed in a tin can; canned.(adjective)
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Use "tinned" in a sentence
"Basically, fizzy drinks are a slurry of sugar (actually, in tinned soda, it's usually high-fructose corn syrup, which is to sugar as plutonium is to oat muffins) with enough liquid to slide out of the can."
"The soup which had been waiting was of the variety known as tinned, an old acquaintance which X. had hoped to have left in the jungle until his return."
"I recently bought a copper frying pan and need to have it "tinned"."