1. Freedom from crooks, curves, bends or angles
   "The straightness of the ruler made it ideal for drawing precise lines"
    
2. (of hair) lack of a tendency to curl
   "The straightness of her hair made it easy to style"
    
3. Trueness of course toward a goal
   "rivaling a hawk in straightness of aim";
   - directness
    
4. Honest and sincere intentions or behaviour
   "His straightness in business dealings earned him respect";
   - good faith, bona fides
    
5. A sexual attraction to (or sexual relations with) persons of the opposite sex
   "straightness is the most common sexual orientation";
   - heterosexuality, heterosexualism

See also: direct, indirect

Type of: characteristic, configuration, conformation, contour, curvature, curve, form, honestness, honesty, sex, sex activity, sexual activity, sexual practice, shape

Antonym: crookedness, curliness

Encyclopedia: Straightness