First Order may refer to:
*
First order (religious)
A religious institute is a type of institute of consecrated life in the Catholic Church whose members take religious vows and lead a life in community with fellow members. Religious institutes are one of the two types of institutes of consecrate ...
, an institute of consecrated life for men
**
First Order of Saint Francis, one such grouping
*
First Order (Star Wars)
The First Order is a fictional military movement and rump state in the ''Star Wars'' franchise, introduced in the 2015 film ''The Force Awakens''. Formed following the fall of the Galactic Empire after the events of ''Return of the Jedi'' (1983 ...
, a fictional autocratic military dictatorship
*
First-order
In mathematics and other formal sciences, first-order or first order most often means either:
* "linear" (a polynomial of degree at most one), as in first-order approximation and other calculus uses, where it is contrasted with "polynomials of high ...
, a term used in mathematics and logic
{{disambiguation