A boarder is someone who rents a room in someone's house. It can also be a student who lives and studies away from home at a boarding school.

There are two main meanings of boarder, but they both involve staying somewhere away from home. A boarding school is a private school where students live as well as study. Those students are called boarders. Also, if someone rents a room of their house to guests, the guests are boarders. Holden Caulfield, the main character of "Catcher in the Rye," was a boarder; that is, until he got thrown out of Pencey Prep.

Definitions of boarder
  1. noun
    a tenant in someone's house
    synonyms: lodger, roomer
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    type of:
    renter, tenant
    someone who pays rent to use land or a building or a car that is owned by someone else
  2. noun
    a pupil who lives at school during term time
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    type of:
    pupil, school-age child, schoolchild
    a young person attending school (up through senior high school)
  3. noun
    someone who forces their way aboard ship
    “stand by to repel boarders
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    type of:
    interloper, intruder, trespasser
    someone who intrudes on the privacy or property of another without permission
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