1. Being usual, typical or standard; not abnormal
   "normal working hours"; "normal word order"; "normal curiosity"; "the normal course of events"; "serve wine at normal room temperature"; "normal diplomatic relations"
    
2. In accordance with scientific laws
   "The chemical reaction proceeded at a normal rate under standard conditions"
    
3. (psychology) being approximately average or within certain limits in e.g. intelligence and development
   "the most normal person I've ever met"; "a perfectly normal child"; "of normal intelligence"
    
4. (geometry) forming a right angle
   "The normal line was perpendicular to the plane"
    
5. (statistics and physics) having a normal distribution
   "The data showed a normal distribution, with most values clustered around the mean";
   - Gaussian

1. Something regarded as a normative example
   "The teacher used this solution as the normal against which to grade the other students' work";
   - convention, pattern, rule, formula
    
2. (geometry) a line or vector that is perpendicular to a line or surface
   "The normal to a plane is always at right angles to it"

Derived forms: normals

See also: average, mean, median, modal, natural, normalcy [N. Amer], normality, perpendicular, regular, sane, standard, typical

Type of: practice

Antonym: abnormal, paranormal

Encyclopedia: Normal, Illinois