Correct spelling, explanation: the term in-person is commonly used as an adjective in the English language, particularly in contemporary contexts. It has become a standard phrase to describe events, meetings, or experiences that require physical presence or direct face-to-face interactions. The difference between in-person and in person lies in their usage as either an adjective or an adverbial phrase. In-person (with a hyphen) is used as an adjective to modify a noun. In person (without a hyphen) is used as an adverbial phrase to describe an action or event.

Definition of in-person:
adjective, taking place with people physically present together in the same place
The in-person training workshop provided participants with hands-on experience and personalized guidance.
After months of virtual classes, the students were excited to attend the in-person graduation ceremony.

Collocations:
Some most commonly used collocations include:
1. In-person meeting: refers to a face-to-face gathering or discussion among individuals.
Let’s schedule an in-person meeting to discuss the project.
2. In-person interview: describes a job interview conducted with the candidate present physically.
The company prefers to conduct in-person interviews to assess candidates’ communication skills.
3. In-person learning: refers to traditional classroom-based education where students attend classes physically.
The school is gradually transitioning back to in-person learning after remote classes during the pandemic.
4. In-person event: describes a gathering, conference, or occasion that requires physical attendance.
The organization is planning an in-person event to celebrate its anniversary.

Correct spelling, explanation: in person and in-person are both correct, as long as the first phrase is used as an adverb and the second phrase is used as an adjective. Remember that an adverb modifies a verb, adding enhancing information such as how or when, and an adjective modifies a noun or pronoun by modifying it with information that tells what kind of. The phrase in person has its etymological roots in Middle English and Old French. It remains a fundamental phrase in the English language, commonly employed in various social, professional, and legal contexts.