The Oxford English Dictionary writes that pansexuality "encompasses all kinds of sexuality; not limited or inhibited in sexual choice with regards to gender or activity."
The concept of pansexuality deliberately rejects the gender binary, the "notion of two genders and indeed of specific sexual orientations", as pansexual people are open to relationships with people who do not identify as strictly men or women.
Pansexuality can also mean the attraction to a person's personality, rather than their physical appearance or gender.