Synonym: answer, clue, explanation, lead, note, opener, pitch, tone. Similar words: turkey, hockey, monkey. Meaning: [kɪː] 
n. 1. metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated 2. something crucial for explaining 3. pitch of the voice 4. any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music 5. a kilogram of a narcotic drug 6. a winged often one-seed indehiscent fruit as of the ash or elm or maple 7. United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843) 8. a coral reef off the southern coast of Florida 9. (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court 10. a list of answers to a test 11. a list of words or phrases that explain symbols or abbreviations 12. a generic term for any device whose possession entitles the holder to a means of access 13. mechanical device used to wind another device that is driven by a spring (as a clock) 14. the central building block at the top of an arch or vault 15. a lever that actuates a mechanism when depressed. v. 1. identify as in botany or biology, for example 2. provide with a key 3. vandalize a car by scratching the sides with a key 4. regulate the musical pitch of 5. harmonize with or adjust to. adj. 1. serving as an essential component 2. effective; producing a desired effect.
n. 1. metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated 2. something crucial for explaining 3. pitch of the voice 4. any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music 5. a kilogram of a narcotic drug 6. a winged often one-seed indehiscent fruit as of the ash or elm or maple 7. United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843) 8. a coral reef off the southern coast of Florida 9. (basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court 10. a list of answers to a test 11. a list of words or phrases that explain symbols or abbreviations 12. a generic term for any device whose possession entitles the holder to a means of access 13. mechanical device used to wind another device that is driven by a spring (as a clock) 14. the central building block at the top of an arch or vault 15. a lever that actuates a mechanism when depressed. v. 1. identify as in botany or biology, for example 2. provide with a key 3. vandalize a car by scratching the sides with a key 4. regulate the musical pitch of 5. harmonize with or adjust to. adj. 1. serving as an essential component 2. effective; producing a desired effect. 
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211) The data was analysed according to neighbourhoods, but other key variables like credit rating, job history, savings and marital status were ignored altogether.
212) By toggling this key, you can switch the italics on and off.
213) At a key moment in his life, he made a judicious investment that was the foundation.
214) The case against her collapsed when a key witness was proved to have lied.
215) Her jewellery is securely under lock and key at the bank.
216) It is helpful if we address a few key questions here.
217) He lifted the mat and slid the key under .
218) Scientists provided the key to understanding the genetic code that determines every bodily feature.
219) There are no sharps or flats in the key of C major.
220) Modernization is the key to speed up our agricultural development.
221) The two books are the same except that this one has an answer key at the back.
221) Wish you will love sentencedict.com and make progress everyday!
222) Press return/the return key twice to leave a blank line.
223) I had to break the door down because I lost the key.
224) This constitutes one of the key elements in this reform programme.
225) She eased the key into the lock, anxious not to wake anyone.
226) To make doubly sure they would not be disturbed she turned the key in the lock.
227) He unlocked her door and handed her back the key.
228) Let me have the key to our car, I'll go for a phonograph and some records.
229) For an explanationof the symbols see the key , inset left.
230) The grand opening hit a snag when no one could find the key.
231) Leave your key with a neighbour in case you lock yourself out one day.
232) The control of inflation is a key component of the government's economic policy.
233) Music students learn how to add other parts to a given tune, and how to modulate to a related key.
234) She was a key figure in the international art world.
235) I will not rest until the murderer is under lock and key.
236) The key was on a high shelf, just beyond her grasp.
237) You can find the symbols in the key at the bottom of the page.
238) If you have an asterisk key on your telephone, please press it now.
239) He started with a good holiday in Key West, Florida.
240) Churches are taking a key role in the democratic process.