reason out
B2 neutral separable transitive
In simple words
To solve a problem by thinking about it carefully and logically, step by step.
Meanings
1 B2 neutral
To find the solution to a problem or the answer to a question by using careful, logical thinking.
"She took a moment to reason out the best route before starting the journey."
Grammar: separable
2 B2 neutral
To resolve a disagreement or confusion by thinking through it rationally.
"The two colleagues sat down and reasoned out their differences rather than letting tensions escalate."
Grammar: separable
Usage notes
Slightly formal in tone. Emphasises rationality and logic rather than intuition or guesswork. Can be used in both intellectual and practical contexts.
Commonly used with
problem solution answer argument position difference
Forms
Base
reason out
I/you/we/they
3rd person
reasons out
he/she/it
Past simple
reasoned out
yesterday
Past participle
reasoned out
have + pp
-ing form
reasoning out
continuous
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Synonyms
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