Base Definition
 bās 
  based, baser, bases, basest, basing
  
    noun
  
 
    bases
  
The lowest or bottom part.
 The base of a cliff; the base of a lamp.
 American Heritage 
The thing or part on which something rests; lowest part or bottom; foundation.
 Webster's New World 
The fundamental or main part, as of a plan, organization, system, theory, etc.; specif., the most loyal supporters of a political candidate or party, a sports team, etc.
 Webster's New World 
The principal or essential ingredient, or the one serving as a vehicle.
 Paint with an oil base.
 Webster's New World 
A supporting part or layer; a foundation.
 A skyscraper built on a base of solid rock.
 American Heritage 
Synonyms: 
  
    adjective
  
 
    baser, basest
  
Forming or serving as a base.
 A base layer of soil.
 American Heritage 
Forming a base.
 Webster's New World 
Situated at or near the base or bottom.
 A base camp for the mountain climbers.
 American Heritage 
Having or showing little or no honor, courage, or decency; mean; ignoble; contemptible.
 A base coward, base ingratitude.
 Webster's New World 
Of, relating to, or containing a base.
 American Heritage 
Synonyms: 
 Antonyms: 
 
    verb
  
 
    based, bases, basing
  
To form or provide a base for.
 Based the new company in Portland.
 American Heritage 
To make or form a base or foundation for.
 Webster's New World 
To find a basis for; establish.
 Based her conclusions on the report; a film based on a best-selling novel.
 American Heritage 
To put or rest (on) as a base or basis.
 To base a guess on past experience.
 Webster's New World 
To assign to a base; station.
 Troops based in the Middle East.
 American Heritage 
    abbreviation
  
 Building, Antenna-tower, Span, Earth.
 Wiktionary 
    idiom
  
 
      off base
    
 - Badly mistaken.
 
American Heritage  
      off base
    
 - not touching the base
 - taking a position or attitude that is unsound or in error
 
Webster's New World  
      on base
    
 - at a base, having reached it safely with a base hit, walk, etc.
 
Webster's New World  
      touch all the bases
    
 - to deal with all related details
 
Webster's New World  
      touch base
    
 - to be in communication or contact
 
Webster's New World  
Idioms, Phrasal Verbs Related to Base
- off base
 - off base
 - on base
 - touch all the bases
 - touch base
 
Origin of Base
-  
Middle English from Old French from Latin basis from Greek gwā- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
 Middle English bas low from Old French from Medieval Latin bassus
From American Heritage Dictionary of the English Language, 5th Edition
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