What's the difference between guard and guardroom?

Guard

Definition:

(n.) To protect from danger; to secure against surprise, attack, or injury; to keep in safety; to defend; to shelter; to shield from surprise or attack; to protect by attendance; to accompany for protection; to care for.
(n.) To keep watch over, in order to prevent escape or restrain from acts of violence, or the like.
(n.) To protect the edge of, esp. with an ornamental border; hence, to face or ornament with lists, laces, etc.
(n.) To fasten by binding; to gird.
(v. i.) To watch by way of caution or defense; to be caution; to be in a state or position of defense or safety; as, careful persons guard against mistakes.
(v. t.) One who, or that which, guards from injury, danger, exposure, or attack; defense; protection.
(v. t.) A man, or body of men, stationed to protect or control a person or position; a watch; a sentinel.
(v. t.) One who has charge of a mail coach or a railway train; a conductor.
(v. t.) Any fixture or attachment designed to protect or secure against injury, soiling, or defacement, theft or loss
(v. t.) That part of a sword hilt which protects the hand.
(v. t.) Ornamental lace or hem protecting the edge of a garment.
(v. t.) A chain or cord for fastening a watch to one's person or dress.
(v. t.) A fence or rail to prevent falling from the deck of a vessel.
(v. t.) An extension of the deck of a vessel beyond the hull; esp., in side-wheel steam vessels, the framework of strong timbers, which curves out on each side beyond the paddle wheel, and protects it and the shaft against collision.
(v. t.) A plate of metal, beneath the stock, or the lock frame, of a gun or pistol, having a loop, called a bow, to protect the trigger.
(v. t.) An interleaved strip at the back, as in a scrap book, to guard against its breaking when filled.
(v. t.) A posture of defense in fencing, and in bayonet and saber exercise.
(v. t.) An expression or admission intended to secure against objections or censure.
(v. t.) Watch; heed; care; attention; as, to keep guard.
(v. t.) The fibrous sheath which covers the phragmacone of the Belemnites.

Example Sentences:

(1) Such margins would be enough to put the first female president in the White House, but Democrats are guarding against complacency.
(2) At the end of each session, he is forced to don a pair of blackened goggles, ear muffs are placed over his head, and he is ordered to place the palms of his hands together so that a guard can grasp his thumbs to lead him away.
(3) DNA-samples from HSV-infected and uninfected Vero cells have been examined concurrently to provide standard "HSV-positive" and "HSV-negative" samples, the latter guarding also against false positives caused by cross-contamination.
(4) Merseyrail plans to operate trains without guards from 2020, although it has promised to redeploy staff.
(5) Sensitizing drugs must be strictly avoided to prevent such recurrences: their presence in drug mixtures must be guarded against.
(6) He joined the Coldstream Guards, while Debo and her mother went to Berne to collect Unity, who had put a bullet through her brain but survived, severely damaged; they coped with Unity's resultant moodiness and incontinence through the first year of war.
(7) Diego Garcia guards its secrets even as the truth on CIA torture emerges Read more The long-awaited decision – expected to cause enormous disappointment – follows more than 40 years of campaigning, court cases and calls for the UK to right a wrong committed by Harold Wilson’s Labour government.
(8) The Thunder now have a 2-0 series lead but can't afford to let their guard down considering they're about to face a wounded and fired up Kobe Bryant at home.
(9) What seems beyond doubt is that Koussa has long represented the old guard which for decades was close to Gaddafi, but which – if the Tripoli rumour mill is to be believed – has recently been pushed aside by Gaddafi's competing sons.
(10) "We have Revolutionary Guards who defied orders, though they were severely punished, expelled from the force and taken to prison," he says.
(11) Sample work-up consisted of addition of internal standard, filtration, then direct injection of the plasma sample onto an internal surface reversed-phase (ISRP) guard column where the dopamine agonist and internal standard were separated from plasma proteins.
(12) Yu Xiangzhen, former Red Guard Photograph: Dan Chung for the Guardian Almost half a century on, it floods back: the hope, the zeal, the carefree autumn days riding the rails with fellow teenagers.
(13) The checkpoints are a recipe for harassment and abuse.” Among other moves disclosed were plans to hire 300 extra security guards to secure public transport in the city.
(14) I ask the Turkish guard to confirm that they will send a search-and-rescue team.
(15) On Tuesday, Romney had one event, a speech to the National Guard Association convention in Reno, Nev. And on the day before that, another single rally, in Mansfield, Ohio.
(16) The young woman is Nobel Peace Prize winner Ellen Johnson-Sirleaf, then part of the new guard of dissidents and critics, now the president of Liberia.
(17) Even when he’s going through the motions of politeness, he rarely lets his guard down.
(18) Three G4S guards were arrested on suspicion of manslaughter.
(19) Beatings with metal bars and cables were followed by so-called “security checks”, during which women in particular were subjected to rape and sexual assault by male guards.
(20) Typically, a local authority or someone with a large commercial property would pay six figures annually for security guards, CCTV, gates and other physical security.