Big money leads to terrible behavior due to power differences. Men AND Women willing to take advantage of less powerful people. I have a female friend who was sexually harrassed by a female VC, and again the same dynamics played out. Its not about gender but primal human desires and power.
Sexual assault:
From the DoJ:
"Sexual assault is any type of sexual contact or behavior that occurs without the explicit consent of the recipient. Falling under the definition of sexual assault are sexual activities as forced sexual intercourse, forcible sodomy, child molestation, incest, fondling, and attempted rape."
Source: https://www.justice.gov/ovw/sexual-assault
Sexual harassment:
From the EEOC, the which is the U.S. federal agency that is responsible for civil rights in the workplace:
"It is unlawful to harass a person (an applicant or employee) because of that person’s sex. Harassment can include “sexual harassment” or unwelcome sexual advances, requests for sexual favors, and other verbal or physical harassment of a sexual nature.
Harassment does not have to be of a sexual nature, however, and can include offensive remarks about a person’s sex. For example, it is illegal to harass a woman by making offensive comments about women in general.
Both victim and the harasser can be either a woman or a man, and the victim and harasser can be the same sex.
Although the law doesn’t prohibit simple teasing, offhand comments, or isolated incidents that are not very serious, harassment is illegal when it is so frequent or severe that it creates a hostile or offensive work environment or when it results in an adverse employment decision (such as the victim being fired or demoted).
The harasser can be the victim's supervisor, a supervisor in another area, a co-worker, or someone who is not an employee of the employer, such as a client or customer."
Source: https://www.eeoc.gov/laws/types/sexual_harassment.cfm
(Edited to include sexual assault, which was included in the parent comment as one of the things apparently lacking a definition)