vt to form a rational conception of.
2. rationalize ·vt to interpret in the manner of a rationalist.
3. rationalize ·vt to make rational; also, to convert to rationalism.
4. rationalize ·vt to render rational; to free from radical signs or quantities.
5. rationalize ·vi to use, and rely on, reason in forming a theory, belief, ·etc., especially in matters of religion: to accord with the principles of rationalism.