Antonym: beneath, off. Similar words: in, of, oh, ok, one, or, own, son. Meaning: [ɑ /ɒn ,ən] 
adj. 1. in operation or operational 2. (of events) planned or scheduled. adv. 1. with a forward motion 2. indicates continuity or persistence or concentration 3. in a state required for something to function or be effective.
adj. 1. in operation or operational 2. (of events) planned or scheduled. adv. 1. with a forward motion 2. indicates continuity or persistence or concentration 3. in a state required for something to function or be effective. 
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211. She has made a television documentary on poverty in our cities.
212. The rocket is due to lift off at noon on Friday.
213. She laid out all her new clothes on the bed.
214. Someone on the radio was gabbling away in a foreign language.
215. In the past central government had a monopoly on television broadcasting.
216. Scientists are on the brink of making a major new discovery.
217. Don't expend all your time on such a useless job.
218. He had spiky light brown hair,[www.Sentencedict.com] shaved at the sides and gelled on top.
219. He noted the latitude and longitude, then made a mark on the admiralty chart.
220. A new kind of car was on display in the shop.
221. Turn the page on yesterday. Only ever think about today and tomorrow.
222. Running on a full bladder is not a good idea.
223. The composition of the group that is studied depends on the interests of the researcher.
224. I can't see the attraction of sitting on the beach all day.
225. On each side of me was a figure in khaki.
226. He reckons they're too soft on mass murderers and says they ought to be strung up.
227. Some of the staff are apt to arrive late on Mondays.
228. It was going on midnight when we left the party.
229. The Congress had agreed to reconsider its stance on the armed struggle.
230. The policeman slipped a pair of handcuffs on his wrists.
231. You'll have to pay excess postal charges on this letter.
232. The national breakdown organizations are on hand to help motorists 24 hours a day.
233. Students on a part-time course are not eligible for a loan.
234. Civil war in the Sudan has been grinding on for nine years.
235. If we plough on until it's dark, we should get this field finished.
236. He was sitting alone by a window with a weird contraption on the bench in front of him.
237. We want you to give us the low-down on your team-mates.
238. We have both dairy and beef cattle on the farm.
239. I don't think these neologisms worth passing on to beginners.
240. We got straight down to business without wasting time on small talk.