Rationale

Rationale may refer to:
 * An explanation of the basis or fundamental reasons for something
 * Design rationale, an explicit documentation of the reasons behind design decisions
 * Rationale (vestment), a liturgical vestment worn by some Roman Catholic bishops
 * Rationale (musician) (born 1984), Zimbabwean-born British singer and songwriter
 * Rationale (Rationale album), 2017
 * Rationale (Glitterer album), 2024