Simple past tense and past participle of portion.(verb)
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Use "portioned" in a sentence
"To-morrow should see the outfit portioned and packed."
"I also like that it tends to be a family-style dessert, baked in a big casserole dish or a loaf pan and and portioned out into both big and small servings."
"I would have hoped that it could be kept together in some sort of museum rather than portioned off to the highest bidders."