Polyamory (from Greek πολύ poly, ""many, several"", and Latin amor, ""love"") is the practice, desire, or acceptance of intimate relationships that are not exclusive with respect to other sexual or intimate relationships, with knowledge and consent of everyone involved. It has been described as ""consensual, ethical, and responsible non-monogamy"", and may or may not include polysexuality (attraction towards multiple genders or sexes).The term ""polyamorous"" can refer to the nature of a relationship at some point in time or to a philosophy or relationship orientation (much like gender or sexual orientation). The word is sometimes used in a broader sense, as an umbrella term that covers various forms of multiple relationships, or forms of sexual or romantic relationships that are not sexually exclusive. Polyamorous arrangements are varied, reflecting the choices and philosophies of the individuals involved, though there is disagreement on how broadly the concept of polyamory applies. An emphasis on ethics, honesty, and transparency all around is widely regarded as the crucial defining characteristic. As of July 2009, it was estimated that more than 500,000 polyamorous relationships existed in the United States.People who identify as polyamorous typically reject the view that sexual and relational exclusivity are necessary for deep, committed, long-term loving relationships. Those who are open to, or emotionally suited for, polyamory may embark on a polyamorous relationship when single or already in a monogamous or open relationship. Sex is not necessarily a primary focus in polyamorous relationships, which commonly consist of people seeking to build long-term relationships with more than one person on mutually agreeable grounds, with sex as only one aspect of their relationships. In practice, polyamorous relationships are highly varied and individualized according to those participating. For many, such relationships are ideally built upon values of trust, loyalty, the negotiation of boundaries, and compersion, as well as overcoming jealousy, possessiveness, and the rejection of restrictive cultural standards.