tank used for collecting and storing a liquid (as water or oil)
lake used to store water for community use
anything (a person or animal or plant or substance) in which an infectious agent normally lives and multiplies; "an infectious agent depends on a reservoir for its survival"
a large or extra supply of something; "a reservoir of talent"
fire that makes it difficult for the enemy to fire on your own individuals or formations; "artillery provided covering fire for the withdrawal"
the act of concealing the existence of something by obstructing the view of it; "the cover concealed their guns from enemy aircraft"
a false identity and background (especially one created for an undercover agent); "her new name and passport are cover for her next assignment"
a recording of a song that was first recorded or made popular by somebody else; "they made a cover of a Beatles' song"
clothe, as if for protection from the elements; "cover your head!"
protect by insurance; "The insurance won't cover this"
maintain a check on; especially by patrolling; "The second officer covered the top floor"
deal with verbally or in some form of artistic expression; "This book deals with incest"; "The course covered all of Western Civilization"; "The new book treats the history of China"
hold within range of an aimed firearm
protect or defend (a position in a game); "he covered left field"
be responsible for guarding an opponent in a game
play a higher card than the one previously played; "Smith covered again"
form a cover over; "The grass covered the grave"
provide with a covering or cause to be covered; "cover her face with a handkerchief"; "cover the child with a blanket"; "cover the grave with flowers"
spread over a surface to conceal or protect; "This paint covers well"
hide from view or knowledge; "The President covered the fact that he bugged the offices in the White House"
be sufficient to meet, defray, or offset the charge or cost of; "Is this enough to cover the check?"
to take an action to protect against future problems; "Count the cash in the drawer twice just to cover yourself"
help out by taking someone's place and temporarily assuming his responsibilities; "She is covering for our secretary who is ill this week"
invest with a large or excessive amount of something; "She covered herself with glory"
make up for shortcomings or a feeling of inferiority by exaggerating good qualities; "he is compensating for being a bad father"
provide for; "The grant doesn't cover my salary"
span an interval of distance, space or time; "The war extended over five years"; "The period covered the turn of the century"; "My land extends over the hills on the horizon"; "This farm covers some 200 acres"; "The Archipelago continues for another 500 miles"