(plural set phrases)
Specific kinds of set phrase may include: idioms, whose meanings cannot be determined from their parts; proverbs, whose meanings can be derived from their parts and which express practical wisdom and often take the form of complete sentences; and catchphrases, set phrases associated with a specific person or group. Most idioms and proverbs are not set phrases, however, as significant variation is often possible. Also many idiomatic expressions do not form single units but allow intervening terms.
Set phrases are often clichés or colloquialisms, but these terms may include expressions other than set phrases.