the activity of exerting your muscles in various ways to keep fit; "the doctor recommended regular exercise"; "he did some exercising"; "the physical exertion required by his work kept him fit"
a task performed or problem solved in order to develop skill or understanding; "you must work the examples at the end of each chapter in the textbook"
systematic training by multiple repetitions; "practice makes perfect"
(usually plural) a ceremony that involves processions and speeches; "academic exercises"
do physical exercise; "She works out in the gym every day"
give a workout to; "Some parents exercise their infants"; "My personal trainer works me hard"; "work one's muscles"
a belief that can guide behavior; "the architect has a theory that more is less"; "they killed him on the theory that dead men tell no tales"
a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena; "theories can incorporate facts and laws and tested hypotheses"; "true in fact and theory"