(slang, dated, World War I) A fussy or overly zealous military superior.

In a rationalistic manner; in the context of rationalism

(philosophy) The proposition that scientific theories, and any other claims to knowledge, can and should be rationally criticized, and, if they have empirical content, can and should be subjected to tests which may falsify them.

(philosophy) A specific form of rationality focusing on the most efficient or cost-effective means to achieve a specific end, but not in itself reflecting on the value of that end.

plural of rationalisation

Third-person singular simple present indicative form of rationalise

(British spelling) alternative spelling of rationalization

To make something rational or more rational.

simple past tense and past participle of rationalise

Given a rational explanation / Reorganised, made more efficient.