What does precondition mean?
A precondition is something that must be true, satisfied, or completed before another event or action can proceed. The term is especially common in formal, legal, technical, and academic writing, where it identifies an essential prior requirement. For example, a contract may make an agreement conditional on a precondition such as the completion of an inspection. The word also has an important logical distinction: a precondition is a necessary condition, meaning that if the result occurs, the condition must have been met, but satisfying the condition alone may not guarantee the result. As a verb, “to precondition” means to impose or establish a requirement beforehand, although this use is much less common than the noun. Overall, the word is useful for describing the checks, circumstances, or requirements that come before a larger action.
A condition, requirement, or circumstance that must be satisfied before another event, action, agreement, or outcome can occur or be valid.
"A successful audit is a precondition for expanding the contract."
Common in formal, legal, academic, and technical contexts; a precondition is necessary but not necessarily sufficient for the subsequent event.
To impose or establish a condition or requirement in advance.
"The application preconditions access to the network on administrator approval."
This verb is rare compared with the much more common noun use.
The standard plural is “preconditions,” used when referring to several requirements that must be fulfilled before a process or outcome can proceed.
"The application checks all preconditions before submitting the request."
A precondition is necessary but not sufficient: satisfying it opens the door, but it does not guarantee what lies beyond.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does precondition come from?
The noun was formed in the early 19th century from the prefix pre-, meaning “before,” and condition. Condition comes through Old French from Latin conditio, a word associated with condicere, “to establish” or “to agree.” The prefix and root thus express a condition established or required in advance. The same Latin foundation appears in related English words such as condition and conditional.
Related word forms
How precondition is actually used
As a noun, precondition is common in formal, technical, legal, and academic contexts. The verb is comparatively rare and usually means to condition something beforehand.
Easily confused with precondition
A condition may be any circumstance or requirement, whereas a precondition specifically occurs or must be satisfied before another event or action.