- The definition of a precursor is something or someone that came before.
An example of a precursor is the dark clouds before a storm.
- Precursor is defined as something that led to the creation of something similar but new.
An example of precursor is how radio came before but helped create television.
- a person or thing that goes before; forerunner; harbinger
- a predecessor, as in office
- a substance that precedes and is the source of another substance
Origin: L praecursor from praecurrere, to run ahead: see pre- and amp; current
Used by arrangement with John Wiley & Sons, Inc.
- One that precedes and indicates, suggests, or announces someone or something to come: Colonial opposition to unfair taxation by the British was a precursor of the Revolution.
- One that precedes another; a forerunner or predecessor: The new principal's precursor was an eminent educator.
- A biochemical substance, such as an intermediate compound in a chain of enzymatic reactions, from which a more stable or definitive product is formed: a precursor of insulin.
Origin: Middle English precursoure, from Old French precurseur, from Latin praecursor, from praecursus, past participle of praecurrere, to run before : prae-, pre- + currere, to run; see kers- in Indo-European roots.
precursor - Medical Definition
- One that precedes and indicates something to come.
- One that precedes another; a forerunner or predecessor.
- A biochemical substance, such as an intermediate compound in a chain of enzymatic reactions, that gives rise to a more stable or definitive product.