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WordNet (r) 3.0 (2006) (WordNet)

straightness
n 1: (of hair) lack of a tendency to curl [ant: {curliness},
{waviness}]
2: freedom from crooks or curves or bends or angles [ant:
{crookedness}]
3: trueness of course toward a goal; "rivaling a hawk in
directness of aim" [synonym: {directness}, {straightness}] [ant:
{indirectness}]
4: having honest intentions; "he acted in good faith"; "doubt
was expressed as to the good faith of the immigrants" [synonym:
{good faith}, {straightness}]
5: a sexual attraction to (or sexual relations with) persons of
the opposite sex [synonym: {heterosexuality}, {heterosexualism},
{straightness}]