(medicine) the act of caring for someone (as by medication or remedial training etc.); "the quarterback is undergoing treatment for a knee injury"; "he tried every treatment the doctors suggested"; "heat therapy gave the best relief"
doing something in opposition to another way of doing it that you don't like; "his style of painting was a reaction against cubism"
a bodily process occurring due to the effect of some foregoing stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age"
an idea evoked by some experience; "his reaction to the news was to start planning what to do"
extreme conservatism in political or social matters; "the forces of reaction carried the election"
a response that reveals a person's feelings or attitude; "he was pleased by the audience's reaction to his performance"; "John feared his mother's reaction when she saw the broken lamp"
(mechanics) the equal and opposite force that is produced when any force is applied to a body; "every action has an equal and opposite reaction"
away from the outer edge; "an inner lane"; "the inside lane"
relating to or being on the side closer to the center or within a defined space; "he reached into his inside jacket pocket"; "inside out"; "an inside pitch is between home plate and the batter"
confined to an exclusive group; "privy to inner knowledge"; "inside information"; "privileged information"
the main tower within the walls of a medieval castle or fortress
maintain by writing regular records; "keep a diary"; "maintain a record"; "keep notes"
hold and prevent from leaving; "The student was kept after school"
retain possession of; "Can I keep my old stuffed animals?"; "She kept her maiden name after she married"
look after; be the keeper of; have charge of; "He keeps the shop when I am gone"
maintain for use and service; "I keep a car in the countryside"; "She keeps an apartment in Paris for her shopping trips"
have as a supply; "I always keep batteries in the freezer"; "keep food for a week in the pantry"; "She keeps a sixpack and a week's worth of supplies in the refrigerator"
store or keep customarily; "Where do you keep your gardening tools?"
supply with room and board; "He is keeping three women in the guest cottage"; "keep boarders"
raise; "She keeps a few chickens in the yard"; "he keeps bees"
keep in a certain state, position, or activity; e.g., "keep clean"; "hold in place"; "She always held herself as a lady"; "The students keep me on my toes"
maintain in safety from injury, harm, or danger; "May God keep you"
fail to spoil or rot; "These potatoes keep for a long time"