diet

A diet is the food that an animal, person, or group usually eats.

Example: Several studies have suggested that high-fat diets can directly increase the risk of this cancer.

A diet is a controlled set of foods chosen for health purposes.

Example: Oprah Winfrey wasn't the only celebrity who transformed her body through exercise and diet last year.

A diet of something is something your experience regularly, usually something negative.

Example: The Daily News has served up a steady diet of local news.

A diet is a council of political leaders.

Example: This week, the Japanese parliament, the Diet, considered but did not act on a resolution apologizing for Pearl Harbor.

If you diet, you limit the food you eat to lose weight.

Example: Weight lost by dieting alone almost never stays off.