uptight /ʌpˈtaɪt/adjective 4noun 1forms 5 adjective4 •Emotionally repressed; nervous and tense. •(informal, disapproving) Sexually repressed.He came from a very uptight religious background, but you wouldn't know that now! •(informal) Excessively concerned with rules and order, always serious.Don't be so uptight! You won't go to jail for crossing the street against the light. •(informal) Unfriendly or rude.Withnail: Just because the best tailoring you’ve ever seen is above your fucking appendix doesn’t mean anything. / Danny: Don’t get uptight with me, man. — 1987 noun1 •(informal) An uptight person. formsuptights · more uptight · uptighter · most uptight · uptightest