straightness

名词 straightness:

1. of hair: lack of a tendency to curl
2. freedom from crooks or curves or bends or angles
3. trueness of course toward a goal
   同义词：directness
4. having honest intentions
   同义词：good faith
5. a sexual attraction to (or sexual relations with) persons of the opposite sex
   同义词：heterosexuality, heterosexualism