- 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.
Idioms about base
- 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
synonym study for base
Other definitions for base (2 of 2)
- of humble origin or station.
- of small height.
- low in place, position, or degree: base servitude.
Origin of base2
synonym study for base
OTHER WORDS FROM basebasely, adverbbaseness, noun
How to use base in a sentence
Both vaccines are based on messenger RNA, or mRNA, which carries instructions for building copies of the coronavirus’ spike protein.Here’s why COVID-19 vaccines like Pfizer’s need to be kept so cold|Tina Hesman Saey|November 20, 2020|Science News
The “clear consensus in the medical and scientific community, based on overwhelming evidence,” is that it does not work, he said.Senate holds hearing on hydroxychloroquine, despite no evidence it works against covid-19|Marisa Iati|November 20, 2020|Washington Post
Mobileye’s camera-based sensors are used by most automakers to support advanced driver assistance systems.Mobileye taps Luminar to supply lidar for its robotaxi fleet|Kirsten Korosec|November 20, 2020|TechCrunch
But, this time, the Republican base is even crazier than before.The Republican Party’s future: Being terrorized by its unhinged base|Paul Waldman|November 20, 2020|Washington Post
Rothman and Schar joined him this spring, with all three turning to Baltimore-based investor John Moag to handle the sale.Washington Football Team minority owners have a deal to sell, but Daniel Snyder is blocking it|Will Hobson, Mark Maske, Liz Clarke|November 20, 2020|Washington Post
He carried the note to Planner—he thrust it into his face, and called him to account for his baseness and ingratitude.
No one has professed greater disgust for baseness of mind or unseemliness of subject.Charles Baudelaire, His Life|Thophile Gautier
Roman vileness and baseness disgusted Augustine even more than Punic insubordination.
They will commit any baseness for money, except betraying their masters.Paul Patoff|F. Marion Crawford
God save me from the meanness of envy, the baseness of jealousy.Ernest Linwood|Caroline Lee Hentz
British Dictionary definitions for base (1 of 2)
- 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 2)
- (of land tenure) held by villein or other ignoble service
- holding land by villein or other ignoble service
Derived forms of basebasely, adverbbaseness, noun
Word Origin for base
Medical definitions for base
Scientific definitions for base
- 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.
Cultural 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.
Other Idioms and Phrases with base
see get to first base; off base; touch base.