Correct spelling, explanation: in person is used as an adverbial phrase to describe an action or event that takes place with a physical presence, typically referring to face-to-face interactions or experiences. On the other hand, in-person is used as an adjective to modify a noun and describe something related to physical presence or direct interaction. These two phrases differ only in a hyphen, so we should be careful not to confuse them. Remember that both in person and in-person are correct.

Definition of in person:
phrase, with the personal presence or action of the individual specified
I was thrilled to finally meet my favorite author in person at the book signing event.
The job interview will be conducted in person, so make sure to prepare well and present yourself confidently.

Collocations with in person:
Some most commonly used collocations include:
1. Interview in person: refers to the process of conducting a job interview with the candidate present physically.
The company decided to interview the shortlisted candidates in person.
2. Attend in person: means to be physically present at an event, meeting, or gathering.
Due to COVID-19 restrictions, only a limited number of people were allowed to attend the conference in person.
3. Talk in person: refers to having a direct conversation with someone while being physically present.
I prefer to talk to my supervisor in person about important matters.
4. Interact in person: means to engage with someone directly, typically through face-to-face communication.
In the digital age, people still value the opportunity to interact in person.

Correct spelling, explanation: in-person is an adjective, and in person is an adverbial phrase. They both refer to physical presence or direct interaction, but their usage differs depending on whether they modify a noun or describe an action. In-person is a modern term and does not have a long historical etymology. As an adjective, in-person is formed by combining the preposition in with the noun person and a hyphen between them, indicating an event, meeting, or experience that occurs with a direct physical presence.