(idiomatic) The amount of time between the initiation of some process and its completion, e.g. the time required to manufacture or procure a product; the time required before something can be provided or delivered.

(now historical) The metal lead. / Graphite, especially as used in pencils. / (countable) A graphite pencil.

(idiomatic) To become the leader, to advance into first place. / (idiomatic) To assume leadership over a group.

plural of leading light

(idiomatic) An acclaimed expert, one of the foremost experts, a luminary. / (nautical, navigation) A light that helps to guide vessels into a port.

(inorganic chemistry) The oxide of lead, PbO, that occurs as the minerals litharge and massicot

Alternative spelling of lead sulfate

(inorganic chemistry) The unstable tetrahydride of lead, PbH₄, plumbane

(inorganic chemistry) The insoluble lead salt or sulfuric acid, PbSO₄, that forms in lead-acid batteries

Describing a battery having lead electrodes and an electrolyte of sulfuric acid solution; used in motor vehicles