rational is on the Academic Word List.

Pronunciation change

Adjective change

Positive
rational

Comparative
more rational

Superlative
most rational

  1. If something is rational, it makes sense and is based on reason.
    Driving without a seatbelt is simply not rational.
    Use of clean fuels is a healthier and more rational approach to meeting our energy needs.
    Science is more linear, logical and rational than art.
    I don't know what happened, but I'm sure there's a perfectly rational explanation.
  2. If someone is rational, they are calm and not emotional.
    It's often difficult to remain rational when people are telling you you're terrible.

Synonym change

Antonym change

See also change