The exact definition of “rape,” “sexual assault,” “sexual abuse” and similar terms differs by state. The wording can get confusing, since states often use different words to mean the same thing or use the same words to describe different things. "Sexual assault: unwanted sexual contact that stops short of rape or attempted rape. This includes sexual touching and fondling. (But, be aware: Some states use this term interchangeably with rape.)" (RAINN, 2009)
“We know the numbers: one in five of every one of those young women who is dropped off for that first day of school, before they finish school, will be assaulted, will be assaulted in her college years.” –Vice President Biden, remarks on the release of a White House report on sexual assault, April 29, 2014
“It is estimated that 1 in 5 women on college campuses has been sexually assaulted during their time there — 1 in 5.” –President Obama, remarks at White House, Jan. 22, 2014