Noun custodian has 1 sense
  1. custodian, keeper, steward - one having charge of buildings or grounds or animals
    --1 is a kind of defender, guardian, protector, shielder
    --1 has particulars:
     caretaker; curator, conservator; gamekeeper, game warden; greenskeeper; house sitter; janitor; lighthouse keeper; pet sitter, critter sitter; zoo keeper
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