An aqueous solution of hydrogen peroxide, containing at least 85% hydrogen peroxide, often also containing a stabilizer to prevent decomposition

An office in England dating from the 15th century (William IV when Duke of Clarence was the last holder until it was assumed by Elizabeth II in 1964).

(idiomatic) To produce or attain, at least for a period of time, an especially satisfactory degree of achievement or fulfilment.

A type of rail transport that operates significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks.

A form of address used for certain members of a royal family.

(psychiatry) A term applied to people with autism who are deemed to be cognitively "higher functioning" (with an IQ of 70 or greater) than other people with autism.

(historical) An ankle boot fastened by a row of buttons (in fashion from the late 19th to mid-20th century).

The first of the Great Officers of State in England, nominally ranking above the Lord Chancellor. The office has generally remained vacant since 1421 and is now primarily ceremonial and filled only for a coronation.

plural of Lord High Steward

Used other than figuratively or idiomatically: see high, blood pressure. / (pathology, colloquial) Synonym of hypertension (abnormally high blood pressure)