expand verb definition in Materials and properties topic from the Oxford Advanced Learner's Dictionary


 verb: Materials and properties topic
[intransitive, transitive] to become greater in size, number or importance; to make something greater in size, number or importance Metals expand when they are heated. Student numbers are expanding rapidly. A child's vocabulary expands through reading. The waist expands to fit all sizes. expand something In breathing the chest muscles expand the rib cage and allow air to be sucked into the lungs. The new system expanded the role of family doctors. There are no plans to expand the local airport.

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