- the distinctively treated portion of a column or pier below the shaft or shafts.
- the distinctively treated lowermost portion of any construction, as a monument, exterior wall, etc.
- the part of an organ nearest its point of attachment.
- the point of attachment.
- any of the four corners of the diamond, especially first, second, or third base.Compare home plate.
- a square canvas sack containing sawdust or some other light material, for marking first, second, or third base.
- a fortified or more or less protected area or place from which the operations of an army or an air force proceed.
- a supply installation for a large military force.
- the number that serves as a starting point for a logarithmic or other numerical system.
- a collection of subsets of a topological space having the property that every open set in the given topology can be written as the union of sets of the collection.
- a collection of neighborhoods of a point such that every neighborhood of the point contains one from the collection.
- a collection of sets of a given filter such that every set in the filter is contained in some set in the collection.
- a compound that reacts with an acid to form a salt, as ammonia, calcium hydroxide, or certain nitrogen-containing organic compounds.
- the hydroxide of a metal or of an electropositive element or group.
- a group or molecule that takes up or accepts protons.
- a molecule or ion containing an atom with a free pair of electrons that can be donated to an acid; an electron-pair donor.
- any of the purine and pyrimidine compounds found in nucleic acids: the purines adenine and guanine and the pyrimidines cytosine, thymine, and uracil.
- an electrode or terminal on a transistor other than the emitter or collector electrodes or terminals.
- the part of an incandescent lamp or electron tube that includes the terminals for making electrical connection to a circuit or power supply.
verb (used with object), based, bas·ing.
verb (used without object), based, bas·ing.
- Baseball. not touching a base: The pitcher caught him off base and, after a quick throw, he was put out by the second baseman.
- Informal. badly mistaken: The police were way off base when they tried to accuse her of the theft.
Origin of base1
Definition for base (2 of 3)
adjective, bas·er, bas·est.
- of humble origin or station.
- of small height.
- low in place, position, or degree: base servitude.
Origin of base2
Definition for base (3 of 3)
noun Surveying, Navigation.
Examples from the Web for base
If ISIS “came into a base and killed hundreds of troops, then people would ask a lot more questions.”Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
In the weeks following the Sept. 9, car bombing at the Iranian base, Iran raided a village in the Pakistani district of Chagai.The Dangerous Drug-Funded Secret War Between Iran and Pakistan|Umar Farooq|December 29, 2014|DAILY BEAST
However, intellectual honesty is the first thing to go when you are forced to constantly pander to your base.
Shortly after the base fell militants started tweeting photographs of MANPADS, both the Russian-made SA-16 and SA-18.
However, the Republican base will be far less forgiving of Paul for his criticism of police policy and his courtship of Sharpton.
The board a has for its base a heavy block of wood b, upon which two upright pins e e, are fixed.A Dictionary of Arts, Manufactures and Mines|Andrew Ure
Orbicular lizards were found about this camp, and had been once or twice before noticed near the base of the mountains.
Commerce, however, fixed Kinshassa as its base of operation, and its expansion has been astonishing for that part of the world.An African Adventure|Isaac F. Marcosson
In a few days he brought back six coins, which he insisted were of base metal.Mysteries of Police and Crime|Arthur Griffiths
But once more, I swear before Heaven that your base charges are false.The Sapphire Cross|George Manville Fenn
British Dictionary definitions for base (1 of 3)
- a centre of operations, organization, or supplythe climbers made a base at 8000 feet
- (as modifier)base camp
- the part of an organ nearest to its point of attachment
- the point of attachment of an organ or part
- the lowest division of a building or structure
- the lower part of a column or pier
- the number of distinct single-digit numbers in a counting system, and so the number represented as 10 in a place-value systemthe binary system has two digits, 0 and 1, and 10 to base two represents 2 See place-value
- (of a logarithm or exponential) the number whose powers are expressedsince 1000 = 10³, the logarithm of 1000 to base 10 is 3
- (of a mathematical structure) a substructure from which the given system can be generated
- the initial instance from which a generalization is proven by mathematical induction
- a root or stem
- See base component
Word Origin for base
British Dictionary definitions for base (2 of 3)
- (of land tenure) held by villein or other ignoble service
- holding land by villein or other ignoble service
Word Origin for base
British Dictionary definitions for base (3 of 3)
Word Origin and History for base (1 of 4)
"bottom, foundation, pedestal," early 14c., from Old French bas "depth" (12c.), from Latin basis "foundation," from Greek basis "step, pedestal," from bainein "to step" (see come). The military sense is from 1860. The chemical sense (1810) was introduced in French 1754 by French chemist Guillaume-François Rouelle (1703-1770). Sporting sense of "starting point" ia from 1690s, also "destination of a runner" (1812). As a "safe" spot in a tag-like game, suggested from mid-15c. (as the name of the game later called prisoner's base).
Word Origin and History for base (1 of 4)
late 14c., "low, of little height," from Old French bas "low, lowly, mean," from Late Latin bassus "thick, stumpy, low" (used only as a cognomen in classical Latin, humilis being there the usual word for "low in stature or position"), possibly from Oscan, or Celtic, or related to Greek basson, comparative of bathys "deep." Figurative sense of "low in the moral scale" is first attested 1530s in English, earlier "servile" (1520s). Base metals (c.1600) were worthless in contrast to noble or precious metals.
Word Origin and History for base (2 of 4)
"to place on a foundation," 1841, from base (n.). Related: Based; basing.
Word Origin and History for base (3 of 4)
1818, from Medieval Latin triangulationem (mid-12c., nominative triangulatio), noun of action from Latin *triangulare, from triangulum (see triangle).
Medicine definitions for base
Science definitions for base (1 of 2)
- Any of a class of compounds that form hydroxyl ions (OH) when dissolved in water, and whose aqueous solutions react with acids to form salts. Bases turn red litmus paper blue and have a pH greater than 7. Their aqueous solutions have a bitter taste. Compare acid.
- See nitrogen base.
- The side or face of a geometric figure to which an altitude is or is thought to be drawn. The base can be, but is not always, the bottom part of the figure.
- The number that is raised to various powers to generate the principal counting units of a number system. The base of the decimal system, for example, is 10.
- The number that is raised to a particular power in a given mathematical expression. In the expression an, a is the base.
Science definitions for base (2 of 2)
Culture definitions for base
Any of a number of bitter-tasting, caustic materials. Technically, a material that produces negative ions in solution. A base is the opposite of an acid and has a pH of 7 to 14. A given amount of a base added to the same amount of an acid neutralizes the acid; water and a salt are produced. Alkalis are bases; ammonia is a common base.
Idioms and Phrases with base
see get to first base; off base; touch base.