exercise >> ˈɛksəsʌɪz
Definition: [noun] activity requiring physical effort, carried out to sustain or improve health and fitness.
Example: exercise improves your heart and lung power
Definition: [noun] an activity carried out for a specific purpose.
Example: an exercise in public relations
Definition: [noun] the use or application of a faculty, right, or process.
Example: the exercise of authority
Definition: [verb] use or apply (a faculty, right, or process).
Example: control is exercised by the Board
Definition: [verb] engage in physical activity to sustain or improve health and fitness.
Example: she still exercised every day
Definition: [verb] occupy the thoughts of; worry or perplex.
Example: Macdougall was greatly exercised about the exchange rate