Bisexual – Sexual attraction to your gender and other genders.
Pansexual – Attraction to people regardless of gender. A lot of times Pansexual and Bisexual are used interchangeably.
Omnisexual – Whereas Pansexual is attracted to people regardless of gender (sometimes called “gender blind”), Omnisexual folks see gender and are still attracted to a variety of people.
Polysexual – Attraction to multiple genders or types of people. It could be considered an umbrella term under which you’d find Bisexual and Pansexual. Polysexual can also be related to gender identity.