The scheduled time for the start of some event, especially a military operation; H-hour.

(idiomatic) A point in time which is nearly too late; the last minute.

(UK, politics) The House of Commons and the House of Lords within the Palace of Westminster.

plural of House of Parliament

(music) A style of music from the early rave scene in the UK.

(UK politics) The lower house of the British Parliament; a session of the house. / (Canada, politics) The lower house of the Canadian Parliament.

(Canada slang, humorous euphemistic) An outhouse: an outbuilding used as a lavatory.

The upper chamber of the UK's Houses of Parliament

(UK, humorous euphemistic slang, dated) A lavatory: a room used for urination and defecation. / (Scotland, humorous euphemistic slang, uncommon) A urinal.

Just before it is too late; in the nick of time; last-minute.