What does logical mean?
Logical describes reasoning, arguments, plans, or conclusions that are based on sound logic. A logical conclusion is one that follows necessarily or reasonably from the facts and premises being considered, while logical reasoning proceeds through valid connections rather than contradictions or unsupported assumptions. The word can also describe something clear, organized, and consistent, as in a logical explanation or a logical approach to a problem. In conversation, logical often functions broadly as a synonym for rational or sensible, but it can sound somewhat technical when used in philosophy, mathematics, computing, or formal debate. Although logical and illogical form a familiar contrast, the word is not limited to arguments: it can characterize a person's thought, the structure of an explanation, a sequence of actions, or the organization of a system.
adjectiveCharacterized by sound reasoning or by conclusions that follow validly from stated premises. It can also mean clear, rational, and internally consistent.
- Characterized by valid reasoning, sound logic, or conclusions that follow from the premises.
- Clear, rational, and internally consistent in approach or organization.
"Her explanation was concise and logical, making the complex problem easy to understand."
"The detective followed a logical sequence of clues rather than relying on guesswork."
"Given the budget and deadline, dividing the work into stages was the most logical approach."
Logical comes from the Greek word logos, meaning “word” and “reason”—so the adjective literally points to ideas connected with reason.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does logical come from?
Logical entered English in the late 16th century from the Latin logicalis, meaning “pertaining to logic.” Latin logicalis came from the Greek logikos, a term associated with logos, meaning “word,” “reason,” or “account.” English logic and logician belong to the same etymological family, while illogical was later formed by adding the negative prefix il-.
Related word forms
How logical is actually used
Logical is neutral and widely used in formal and informal contexts. In everyday speech it may mean simply “reasonable” or “sensible,” although in technical discussion it more precisely concerns conclusions that follow validly from their premises.
Easily confused with logical
Logical describes reasoning or a conclusion that follows validly, whereas illogical describes reasoning that is contradictory or fails to follow logically.