Straight describes a person attracted to people of the opposite sex, also called heterosexual.
Straight means heterosexual: being romantically and sexually attracted to people of the opposite sex. A straight woman is drawn to men, and a straight man is drawn to women.
It is one of several sexual orientations and is often used casually, as in writing “I’m straight” on a dating profile. The word describes who someone is attracted to, not how they dress, behave, or present themselves to the world.
Sexual orientation can be more fluid than a single label suggests, and some people use terms like “mostly straight” or “heteroflexible” to capture that nuance. Orientation is also distinct from gender identity, which is about who you are rather than who you are attracted to.
On dating apps, stating your orientation simply helps match you with compatible people more easily. It is a clear, useful filter for finding mutual interest without a lot of guesswork up front.