Something from which other things extend; a foundation.

The starting point of a logical deduction or thought; basis.

A site, structure, or both, usually durable and often permanent, for housing military personnel and materiel.

The place where decisions for an organization are made; headquarters.

(cooking, painting, pharmacy) A basic but essential component or ingredient.

A substance used as a mordant in dyeing.

(cosmetics) Foundation: a cosmetic cream to make the face appear uniform.

(chemistry) Any of a class of generally water-soluble compounds that turn red litmus blue and react with acids to form salts.

Important areas in games and sports.

(architecture) The lowermost part of a column, between the shaft and the pedestal or pavement.

(biology, biochemistry) A nucleotide's nucleobase in the context of a DNA or RNA biopolymer.

(botany) The end of a leaf, petal or similar organ where it is attached to its support.

(electronics) The name of the controlling terminal of a bipolar transistor (BJT).

(geometry) The lowest side of a triangle or other polygon, or the lowest face of a cone, pyramid or other polyhedron laid flat.

(heraldry) The lowest third of a shield (or field), or an ordinary occupying this space, the champagne. (Compare terrace.)

(mathematics) A number raised to the power of an exponent.

(mathematics) Synonym of radix.

(topology) The set of sets from which a topology is generated.

(topology) A topological space, looked at in relation to one of its covering spaces, fibrations, or bundles.

(group theory) A sequence of elements not jointly stabilized by any nontrivial group element.

(acrobatics, cheerleading) In hand-to-hand balance, the person who supports the flyer; the person that remains in contact with the ground.

(linguistics) A morpheme (or morphemes) that serves as a basic foundation on which affixes can be attached.

(music) Dated form of bass.

(military, historical) The smallest kind of cannon.

(archaic) The housing of a horse.

(historical, sometimes in the plural) A kind of skirt (often of velvet or brocade) which hung from the middle to about the knees, or lower.

(historical, sometimes in the plural) A kind of armour skirt, of mail or plate, imitating the preceding civilian skirt.

(obsolete) The lower part of a robe or petticoat.

(obsolete) An apron.

A line in a survey which, being accurately determined in length and position, serves as the origin from which to compute the distances and positions of any points or objects connected with it by a system of triangles.

(politics) A group of voters who almost always support a single party's candidates for elected office.

(Marxism) The forces and relations of production that produce the necessities and amenities of life.

A material that holds paint or other materials together; a binder.

(aviation) Ellipsis of base leg.

(slang, uncountable) freebase cocaine

(transitive) To give as its foundation or starting point; to lay the foundation of.

(transitive) To be located (at a particular place).

(acrobatics, cheerleading) To act as a base; to be the person supporting the flyer.

(slang) To freebase.

(obsolete) Low in height; short.

Low in place or position.

(obsolete) Of low value or degree.

(archaic) Of low social standing or rank; vulgar, common.

Morally reprehensible, immoral; cowardly.

(now rare) Inferior; unworthy, of poor quality.

(of a metal) Not considered precious or noble.

Alloyed with inferior metal; debased.

(obsolete) Of illegitimate birth; bastard.

Not classical or correct.

Obsolete form of bass.

(law) Relating to feudal land tenure held by a tenant from a lord in exchange for services that are seen as unworthy for noblemen to perform, such as villeinage.

(now chiefly US, historical) The game of prisoners' bars.

Alternative form of BASE.