1. (n.) A word which was made the criterion by which to distinguish the Ephraimites from the Gileadites. The Ephraimites, not being able to pronounce sh, called the word sibboleth. See Judges xii.

2. (n.) Also in an extended sense.

3. (n.) Hence, the criterion, test, or watchword of a party; a party cry or pet phrase.

banality bromide byword catch phrase catchword cliche countersign cry fad word jargon open sesame password pet expression phrase platitude prosaicism prosaism rubber stamp secret grip slogan tag tessera token truism vogue word watchword