interloper
/ˈɪntərˌloʊpər/
noun
- A person who becomes involved in a situation or a place where they are not wanted or do not belong.
- New employees sometimes feel like interlopers until they get to know their coworkers.
- The quiet party was disrupted by an interloper who started arguing with everyone.
- The hikers felt like interlopers when they stumbled upon a private ceremony in the forest.
- A person who intrudes on someone else's property or territory without permission.
- The farmer chased the interloper out of his cornfield with a shovel.
- Security cameras caught an interloper climbing over the fence late at night.
- The dog barked loudly at any interloper who came near the yard.