tickler Meaning, Definition & Usage

  1. noun a file of memoranda or notices that remind of things to be done
    tickler file.

WordNet

Tic"kler noun
Definitions
  1. One who, or that which, tickles.
  2. Something puzzling or difficult.
  3. A book containing a memorandum of notes and debts arranged in the order of their maturity. Com. Cant, U.S. Bartlett.
  4. A prong used by coopers to extract bungs from casks. Eng.

Webster 1913