(UK) To announce the closing of a pub for the day. / (UK) To end something. / (sports) To call a timeout. / (US, education) To indicate that an activity, especially the taking of a test, is complete.

fiddler crab

A hierarchy or tree of people (employees, students etc.) in which each person forwards a message to the next person down the line. The tree is arranged so that a single person can easily forward messages to all people.

The note naturally used by a male bird to call a female. It is artificially applied by birdcatchers as a decoy.

A captive bird used by hunters to lure free-flying birds into a snare or trap. / (figuratively, by extension) Anything desirable used to lure somebody.

A usually symbolic formal meeting in which a diplomat or representative of a state pays a visit out of courtesy to a head of state or state office holder.

(UK, historical) A place, usually a public house, where journeymen connected with a particular trade assembled when out of work, ready for the call of employers.

What one's duty obliges one to do.

(transitive) To cause to be questioned; to introduce doubt regarding.

An appeal for action. / (marketing) A device designed to prompt an immediate response or encourage an immediate sale.