From Longman Dictionary of Contemporary Englishpotatopo‧ta‧to /pəˈteɪtəʊ $ -toʊ/ ●●● S2 noun (plural potatoes) 1 
[countable, uncountable]DF a round white vegetable with a brown, red, or pale yellow skin, that grows under the groundroast/fried/boiled/mashed potatojacket potato (=cooked in its skin) Marie stood at the sink, peeling potatoes (=cutting off the skin).2 [countable]TACHBP a plant that produces potatoesCOLLOCATIONSverbspeel potatoes (=cut the skin off them)Peel and slice the potatoes.slice potatoes (=cut them into long thin pieces)dice potatoes (=cut them into small square pieces)mash potatoes (=crush them until they are smooth, after boiling them)ADJECTIVES/NOUN + potatoboiled potatoesServe with plain boiled potatoes.mashed potato(es) (=boiled and crushed until smooth)I like sausages with mashed potatoes.roast potatoes (=cooked in an oven with fat)traditional roast beef with roast potatoesa baked/jacket potato (=cooked in its skin)We cooked baked potatoes in the embers of the fire.
[countable, uncountable]DF a round white vegetable with a brown, red, or pale yellow skin, that grows under the groundroast/fried/boiled/mashed potatojacket potato (=cooked in its skin) Marie stood at the sink, peeling potatoes (=cutting off the skin).2 [countable]TACHBP a plant that produces potatoesCOLLOCATIONSverbspeel potatoes (=cut the skin off them)Peel and slice the potatoes.slice potatoes (=cut them into long thin pieces)dice potatoes (=cut them into small square pieces)mash potatoes (=crush them until they are smooth, after boiling them)ADJECTIVES/NOUN + potatoboiled potatoesServe with plain boiled potatoes.mashed potato(es) (=boiled and crushed until smooth)I like sausages with mashed potatoes.roast potatoes (=cooked in an oven with fat)traditional roast beef with roast potatoesa baked/jacket potato (=cooked in its skin)We cooked baked potatoes in the embers of the fire. Examples from the Corpus
potato• The Colorado beetle spreads over a potato crop and a human population starves.• The salad was in the ice box, and the roast and potatoes in the oven.• a baked potato• Try these deliciously crunchy potato skins with garlic mayonnaise as an alternative to the chive and garlic dressing.• Long tables with stainless-steel trays held mashed potatoes, sauerkraut, fried oysters and oyster stew.• mashed potatoes• It goes together easily with butternut squash, onion, potato, carrots and broth.• Good Friday in East Anglia used to be the traditional day for planting potatoes.• He later became director of the potato program and was named state seed commissioner in 1988.• Carefully remove the potatoes from the pan with a slotted spoon and reserve any remaining stock to make the gravy if desired.peeling potatoes• We are peeling potatoes, forming tiny meatballs, browning chicken, shelling peas.• Betty was sitting in the porch of the cottage peeling potatoes.• Just a pair of hands peeling potatoes and a reflection in the mirror.• When Ruth went into the house Hester was sitting on an upright chair by the table, peeling potatoes.Origin potato (1500-1600) Spanish batata, from Taino 