algebra

Fetched 2026-10-26 (cache).

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Noun

1. {{senseid|en|Q3968}}{{lb|en|uncountable|mathematics}} [[elementary algebra|Elementary algebra]]: A system for representing and manipulating [[unknown]] quantities ([[variables]]) in [[equation]]s.
2. {{lb|en|uncountable|mathematics|sometimes capitalized}} [[abstract algebra|Abstract algebra]]: A broad field of study in modern mathematics (often mentioned alongside [[analysis]]) loosely characterized by its concern for [[abstraction]] and [[symmetry]], dealing with the behavior, classification, and application of a large class of objects (called [[algebraic structure]]s) and the [[maps]] between them (called, most generally, [[morphism]]s).
3. {{lb|en|countable|mathematics|algebra}} {{non-gloss|Any of several objects of study in '''Algebra'''}}
4. {{lb|en|countable|set theory|analysis}} A collection of subsets of a given set, such that this collection contains the empty set, and the collection is closed under [[union]]s and [[complement]]s (and thereby also under [[intersection]]s and [[difference]]s).
5. {{lb|en|figurative}} A system or process (especially one that is complex or [[convoluted]]) that substitutes one thing for another, or uses signs or symbols to represent concepts or ideas.
6. {{lb|en|uncountable|medicine|historical|rare}} The surgical treatment of a dislocated or fractured bone. Also {{lb|en|countable}}: a dislocation or fracture.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.