Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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air base a military base for air force operations.
base hit in baseball, a hit that allows the batter to get on base safely, without an error or force-out being made.
base line in baseball, the area within which a runner must stay while running from base to base. [3 definitions]
base on balls in baseball, an advance to first base taken by a batter to whom four balls have been pitched. (See walk.)
base runner in baseball, any member of the team at bat who is safely on base or is running toward a base.
database a large collection of information in a computer. In a database, information is arranged so that it can be quickly changed or searched through.
extra-base hit in baseball, a double, triple, or home run.
first base in counterclockwise order from home plate, the first of three bases marking the infield of a baseball diamond. [2 definitions]
get to first base to complete the first step towards reaching a goal; begin to succeed.
off base wrong; mistaken
second base in baseball, the second of four bases, located behind the pitcher's mound and opposite home plate. [2 definitions]
third base in baseball, the base that is located between second base and home plate. [2 definitions]
three-base hit a hit in baseball that allows the batter to reach third base safely; triple.
two-base hit in baseball, a hit that allows the batter to reach second base; double.
zero-base having each budget expenditure justified on a basis of cost or need without consideration for the expenditures of a previous budget.