An amount that is twice as much as a given amount.

दो गुना

English Usage: He won a double of what he bet.

Hindi Usage: उसने जो दांव लगाया, उसका दो गुना जीत लिया।

To increase something by twofold.

दो गुना करना

English Usage: She needs to double her efforts to succeed.

Hindi Usage: उसे सफल होने के लिए अपने प्रयासों को दो गुना करना होगा।