Single file

adj, adv, noun

Definitions

Adjective
  1. 1
    One person wide. not-comparable

    "They walked in a single file line."

Adverb
  1. 1
    In a line or queue one person wide. not-comparable

    "They walked single file."

Noun
  1. 1
    A line or queue one person wide. uncountable, usually

    "They walked in a single file."

  2. 2
    a line of persons or things ranged one behind the other wordnet

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