Antonym: known. Similar words: flunk, skunk, chunk, trunk, know, sunken, debunk, knob. Meaning: [ʌnˈnəʊn] 
n. 1. an unknown and unexplored region 2. anyone who does not belong in the environment in which they are found 3. a variable whose values are solutions of an equation. adj. 1. not known 2. being or having an unknown or unnamed source 3. not known to exist 4. not famous or acclaimed 5. not known before.
n. 1. an unknown and unexplored region 2. anyone who does not belong in the environment in which they are found 3. a variable whose values are solutions of an equation. adj. 1. not known 2. being or having an unknown or unnamed source 3. not known to exist 4. not famous or acclaimed 5. not known before. 
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241. For if I pray in an unknown tongue , my spirit prayeth, but my understanding is unfruitful.
242. Postumer Posthumous discoveries of Mozart works are rare but not unknown.
243. What we would find if we could fly to the moon is an unknown quantity.
244. To remove ( an unknown quantity ) by combining equations.
245. The orbiter is programmed to go into safe mode when it encounters an unknown event.
246. The method has good preciseness and less unknown and convenient to be used in practice.
247. Kerry an unknown quantity to most Americans, but better known Democrats are much in the news.
248. This media contains unknown or unreadable data. Do you want to erase?
249. Sometimes, it is better to remain unknown than to make pimple hate you.
250. And as the unknown unknowns have turned into known unknowns, the system has been experiencing postmodern.
251. On December 1, 1955, Rosa Parks was an unknown black seamstress living in Montgomery, Alabama.
252. The master touches the roundel while he whispers something in an unknown tongue.
253. I, your vassal, have employed and troubled your unknown sovereignty.
254. The health effects of such alterations are often unknown, sometimes unknowable.
255. The extent of other psychopathology in patients with ESRD is largely unknown.
256. We use x as the symbol for an unknown quantity.
257. A length of unidentifiable brown woody tree bark, possibly cinnamon -- meaning unknown.
258. This media contains unknown or unreadable data. Do you want to overwrite?
259. A length of unidentifiable woody plant stem, brown and tan, vertically ridged -- meaning unknown.
260. This media contains unknown or unreadable data. Do you want to initialize? Sentencedict.com
261. President Clinton changed the unknown Yu Cun village with his 1998 visit.
262. Whether do we walk together or a question mark, the unknown?
263. This media contains unknown or unreadable data. Do you want to format?
264. It will able to detect new, unknown attacks with undocumented attack patterns.
265. He laid a wreath at the grave of the unknown soldier.
266. For an unknown intraocular inflammation or uveitis, syphilis must be included in the differential diagnosis.
267. And still the cause of the phocomelia outbreak remained unknown.
268. In 1921, President Harding dedicated the Tomb of the Unknown Soldier in Arlington National Cemetery.
269. With the age , physical victimization is decreasing, but unknown control is increasing.
270. Do not open any files attached to an e - mail from an unknown, suspicious or untrustworthy source.
More similar words: flunk, skunk, chunk, trunk, know, sunken, debunk, knob, drunken, knock, junk mail, hunker down, know about, knock out, knock off, well-known, well known, knock down, knowledge, doorknob, hunkered down, acknowledge, acknowledgement.