(finance) An interest rate charged by a central bank for very short-term loans to other banks against an approved collateral.

(UK, military, nautical, historical) Of a Royal Navy ship of the line in the Napoleonic Era: having 64–80 guns across two gun decks, a complement of 500–650, and weighing approximately 1,750 tons burthen.

(Britain, informal) A person who signs up for a credit card that has a special introductory offer, such as low or zero interest for a certain period, uses the card for the duration of the offer, then cancels the card and switches to another with a similar offer, and so on.

(idiomatic) The current standard or usual price, rate, or salary for something.

(UK, military, nautical, historical) Of a Royal Navy ship of the line in the Napoleonic Era: having 80–98 guns across three gun decks, a complement of 700–750, and weighing approximately 2,200 tons burthen.

(UK, military, nautical, historical) A second-rate ship of the line.

(telecommunications) The number of telephone lines per 100 people in a region.

Alternative spelling of birthrate

(meteorology) The rate of change in an atmospheric variable, especially temperature, with increase of height.

(UK) a rate (typically of money) that does not vary over time