What does checklist mean?
A checklist is a list of items, actions, or criteria arranged so that each one can be individually verified or completed. Its purpose is simple but powerful: to protect against human forgetfulness and oversight by transferring reliance from memory to paper or screen. Checklists appear everywhere, from a shopper's grocery list to the rigorous pre-flight routines of airline pilots and the surgical safety protocols adopted by hospitals worldwide. The word is neutral in tone and works equally well in casual conversation and formal documentation. Common pairings include "pre-flight checklist," "safety checklist," and phrases like "run through" or "tick off" a checklist. Because it implies systematic care, calling something a checklist often signals diligence and professionalism. The word gained renewed cultural prominence after Atul Gawande's 2009 book *The Checklist Manifesto*, which argued that this unassuming tool can improve outcomes even among highly trained experts.
nounA list of items, tasks, or points to be checked, considered, or completed, used as a practical aid to ensure that nothing is overlooked.
- A written or printed list of items to be verified, tasks to be done, or criteria to be satisfied, used to guard against omission.
"Before takeoff, the pilot ran through the pre-flight checklist with her co-pilot."
"She ticked off each item on her packing checklist before leaving for the airport."
"The inspector followed a detailed safety checklist to ensure every regulation had been met."
Regular plural; used when referring to multiple such lists, e.g. across departments, flights, or projects.
"Different airlines maintain their own checklists for every stage of flight."
Atul Gawande's book *The Checklist Manifesto* showed how this humble tool — credited to pilots in the 1930s after a fatal B-17 crash — can outperform expert memory in medicine, aviation, and beyond.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of checklist
The noun "checklist" is formed transparently within English from the verb "check" (in the sense of verifying or examining) combined with "list." The verb "check" itself has a tangled history, tracing back through Middle English to Old French "eschequier," ultimately from Persian via Arabic, originally referring to the chess term "shah" (king). Compound forms with "check-" became productive in English, and "checklist" emerged as a standard compound in the modern era, becoming especially widespread with the rise of aviation procedures in the twentieth century.
Related word forms
How checklist is actually used
The word is neutral in register and common in both everyday and professional contexts. It carries connotations of thoroughness, procedure, and reliability rather than formality, and it is frequently associated with high-stakes fields such as aviation and medicine as well as mundane tasks like packing or shopping.
Easily confused with checklist
"Checklist" is the standard single-word form in modern usage; the two-word "check list" is an older variant now largely superseded.