Definition for bases (2 of 6)
Definition for bases (3 of 6)
- 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.
Origin of base1
Definition for bases (4 of 6)
noun, plural ba·ses [bey-seez] /ˈbeɪ siz/.
Origin of basis
Definition for bases (5 of 6)
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 bases (6 of 6)
noun Surveying, Navigation.
Examples from the Web for bases
The U.S. is relying more these days on bases outside the country.
The violence continues, but on a scale diminished since when American bases and outposts dotted the province.
Soldiers rotated out of the valley from other bases in the Pech for a weekend of relief from the fighting before being sent back.
Lunch finally arrives, this time not a sumptuous feast but fish wrapped in a military newspaper distributed on U.S. bases.
Yet both parties also devote millions each midterm to rally their bases and get out the vote.
It is this power of combination with bases that makes them of value in wool dyeing.The Dyeing of Woollen Fabrics|Franklin Beech
Chlorine has a powerful affinity for bases of all kinds, particularly metallic bases and hydrogen.A System of Logic: Ratiocinative and Inductive|John Stuart Mill
At the other bases there was no form of entertainment and we had to go to the nearest city for alcohol and movies.The Biography of a Rabbit|Roy Benson
The supercargo had noticed how the groups clinging at the bases of the other trees continually diminished.South Sea Tales|Jack London
It is because bases neutralize acids that you put baking soda with sour milk when you make sour milk pancakes or muffins.Common Science|Carleton W. Washburne
British Dictionary definitions for bases (1 of 6)
British Dictionary definitions for bases (2 of 6)
British Dictionary definitions for bases (3 of 6)
British Dictionary definitions for bases (4 of 6)
- 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 bases (5 of 6)
- (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 bases (6 of 6)
noun plural -ses (-siːz)
Word Origin for basis
Word Origin and History for bases (1 of 5)
1818, from Medieval Latin triangulationem (mid-12c., nominative triangulatio), noun of action from Latin *triangulare, from triangulum (see triangle).
Word Origin and History for bases (1 of 5)
"to place on a foundation," 1841, from base (n.). Related: Based; basing.
Word Origin and History for bases (2 of 5)
"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 bases (3 of 5)
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 bases (4 of 5)
1570s, "bottom or foundation (of something material)," from Latin basis "foundation," from Greek basis "a step, stand, base, that whereon one stands," from bainein "go, step" (see come). Transferred and figurative senses (of immaterial things) are from c.1600.
Medicine definitions for bases (1 of 2)
Medicine definitions for bases (2 of 2)
n. pl. ba•ses (-sēz′)
Science definitions for bases (1 of 3)
- 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 bases (2 of 3)
Plural bases (bā′sēz′)
Science definitions for bases (3 of 3)
Culture definitions for bases
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 bases (1 of 2)
see get to first base; off base; touch base.
Idioms and Phrases with bases (2 of 2)
see on a first-name basis.