Grand
What it really means
A thousand pounds. "Two grand" = £2,000. The plural has no "s". (In Ireland and parts of the UK, "grand" can also mean "fine/great".)
Context, tips & common mistakes
A grand is £1,000, and like quid it never takes an s: three grand, twenty-five grand, half a grand. You will hear it constantly wherever money is discussed at scale — salaries ('the job pays twenty-eight grand'), cars, weddings, house deposits — and written informally it becomes 'k' ('28k').
Register: fine in speech almost anywhere informal, out of place in documents and negotiations, where figures are written properly. Comprehension matters more than production here — when a letting agent says the deposit is 'one and a half grand', or a colleague says the course costs 'a couple of grand', you need the number instantly, because nodding along with money vocabulary is how newcomers agree to things they did not price.