A girlfriend is a female friend or acquaintance, often a regular female companion with whom one is platonic, romantically or sexually involved. This could be a long-term committed relationship. This is normally a short-term committed relationship, where other titles (e.g. ladyfriend, partner) are more commonly used for long-term committed relationships. A girlfriend can also be called an admirer, beau, suitor and sweetheart.
Partners in committed relationships are also sometimes described as a "significant other" or simply "partner", especially if the individuals are cohabiting.
"Girlfriend" and "partner" mean different things to different people; the distinctions between the terms are subjective. How the term is used will ultimately be determined by personal preference.
In 2005, a study was conducted of 115 people ages 21 to 35 who were either living with or had lived with a romantic partner. It notes that the lack of proper terms often leads to awkward situations, such as someone becoming upset over not being introduced in social situations to avoid the question.
There exists some ambiguity between the terms "girl friend," or a friend who is a girl, and "girlfriend." The transition between the two is a significant aspect of adolescent development.
Both forms of "girlfriend" and "girl friend" are used by different people to mean different things. For example, when the term "girlfriend" is used by a girl or woman about another female in a non-sexual, non-romantic context, the two-word form "girl friend" is sometimes used to avoid confusion with the sexual or romantic meaning; however, this is not a rule. In this sense of its usage, "girlfriend" is used in terms of very close friends and has no sexual connotations, unless it is in the case of lesbian, bisexual women. The term "girlfriend" is also used in LGBT communities and can refer to people of any sex or sexuality.
The term "girlfriend" does not necessarily imply a sexual relationship, but is often used to refer to a girl or woman who is dating a person she is not engaged to without indicating whether she is having sex with him or her. With differing expectations of sexual mores, the term "dating" can imply romantic activity whereas simply using "friend" would likely avoid implying such intimacy. It is essentially equivalent to the term "sweetheart", which has also been used as a term of endearment.