Antonyms for the term "adult female" could refer to different contexts or perspectives. From the biological aspect, the antonym for an adult female could be an adult male. However, from a societal or cultural context, the opposite of an adult female could imply various things, such as a child, a teenager, a non-binary individual, or a male. In terms of gender identity, the antonym for an adult female could be a transgender male or a genderqueer person. Additionally, some contexts may not require gender identification, and the antonym for an adult female could be a non-human or inanimate object. It's essential to consider the context and purpose to determine the appropriate antonym for the term "adult female.