BrE /ɪnˈkriːs/ ; NAmE /ɪnˈkriːs/ [intransitive, transitive] to become or to make something greater in amount, number, value, etc. increase (from A) (to B) The population has increased from 1.2 million to 1.8 million. increasing levels of carbon dioxide in the earth’s atmosphere Increasing numbers of people are using handheld devices to access the Internet. The price of oil increased. increase in something Oil increased in price. increase by something The rate of inflation increased by 2%. increase with something Disability increases with age (= the older somebody is, the more likely they are to be disabled). increase something (from A) (to B) We need to increase productivity. increase something (by something) They've increased the price by 50%.