What is the definition of a he-she?

The term "he-she" is not a recognized grammatical term or word in the English language. It's often used informally as a placeholder for someone whose gender is unknown or irrelevant, but it's not considered proper English usage.

Here's why:

* Singular they: The most common and grammatically correct way to refer to a person of unknown gender is to use the singular "they." For example: "The person who left their phone here can claim it at the front desk."

* Gender-neutral pronouns: Using pronouns like "they," "them," and "their" helps avoid assumptions about someone's gender identity.

* Avoiding assumptions: Using "he-she" implies that someone must be either male or female, which can be problematic for people who identify as non-binary or gender-fluid.

It's important to be mindful of language and use inclusive terms that respect everyone's gender identity.