Queer has traditionally meant odd or unusual, though modern use often pertains to LGBT people. Its use is considered controversial and underwent substantial changes over the course of the 20th century with some LGBT people re-claiming the term as a means of self-empowerment. The term is still considered by some to be offensive and derisive, and by others as a re-appropriated term used to describe a sexual orientation and/or gender identity or gender expression that does not conform to heteronormative society.