Regular
- Axiom of Regularity
- Borel regular measure
- British Regulars
- Castelnuovo–Mumford regularity
- Cauchy-continuous function
- Closed regular set
- Free regular set
- Irregular (disambiguation)
- Irregularity of a surface
- Moses Regular
- Partition regularity
- Quasiregular
- Regular (Badfinger song)
- Regular Army (United States)
- Regular Baptists
- Regular Force
- Regular Lie group
- Regular Masonic jurisdictions
- Regular algebra
- Regular army
- Regular cardinal
- Regular category
- Regular chain
- Regular character
- Regular clergy
- Regular code
- Regular conditional probability
- Regular curve
- Regular division of the plane
- Regular economy
- Regular element (disambiguation)
- Regular expression
- Regular extension
- Regular function
- Regular graph
- Regular grid
- Regular homotopy
- Regular ideal
- Regular inflection
- Regular isotopy
- Regular language
- Regular map (algebraic geometry)
- Regular map (graph theory)
- Regular matrix (disambiguation)
- Regular matroid
- Regular measure
- Regular modal logic
- Regular monomorphism
- Regular moon
- Regular number
- Regular p-group
- Regular paperfolding sequence
- Regular point
- Regular polygon
- Regular polyhedron
- Regular polytope
- Regular prime
- Regular ring
- Regular script
- Regular semi-algebraic system
- Regular semigroup
- Regular set (disambiguation)
- Regular singular point
- Regular skew polyhedron
- Regular solution
- Regular space
- Regular stance
- Regular tree grammar
- Regular tuning
- Regular verb
- Regularity theory
- Roman type
- Semigroup with involution
- Szemerédi regularity lemma