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covalent bond the chemical bond between two atoms, each of which supplies one half of each pair of shared electrons; covalence.
covariance in statistics, a measure of how two variables are related, equal to the product of the deviation of each variable from its mean. In positive covariance, the two variables (such as temperature and air conditioner use) are directly related and follow the same trend. In negative covariance, the two variables (such as temperature and heater use) are inversely related and follow opposite trends.
covariation in statistics, correlated variation of two or more variables.
cove a small recess in a shoreline; bay. [4 definitions]
coven a group or band of witches, esp. one having thirteen members.
covenant a usu. formal agreement between two or more parties to engage in or refrain from something. [6 definitions]
Coventry a city in central England.
cover to put or spread something over or on, as for protection or concealment. [21 definitions]
coverable combined form of cover.
coverage the amount or type of protection available against loss or liability as provided by insurance or reserve funds, or the protection itself. [3 definitions]
coveralls a one-piece protective garment with trousers and sleeves, worn by workmen over clothing.
cover charge a fixed amount charged by nightclubs and restaurants in addition to the price of food and drink, often used to defray the cost of live entertainment or music.
cover crop a quick-growing crop planted to prevent soil erosion or soil depletion.
covered wagon a large wagon with a high arched canvas cover, used by American pioneers.
cover girl a young woman whose picture is on the cover of a magazine.
cover ground to pass over an area. [2 definitions]
covering something that covers or conceals.
coverless combined form of cover.
coverlet the topmost cover on a bed; bedspread or counterpane.
cover letter a letter of explanation enclosed with a document, package, or the like.
cover story a magazine article featured in the picture or headlines on the magazine's cover. [2 definitions]