Synonym: attentive, lively, nimble, on the job, prompt, ready, watchful, dull, slow, torpid. Similar words: dealer, ruler, clerk, killer, gallery, clergy, hitler, bowler. Meaning: [ə'lɜːt] 
n. 1. condition of heightened watchfulness or preparation for action 2. a warning serves to make you more alert to danger 3. an automatic signal (usually a sound) warning of danger. v. warn or arouse to a sense of danger or call to a state of preparedness. adj. 1. very attentive or observant 2. mentally responsive 3. not unconscious; especially having become conscious 4. (usually followed by `to') showing acute awareness; mentally perceptive.
n. 1. condition of heightened watchfulness or preparation for action 2. a warning serves to make you more alert to danger 3. an automatic signal (usually a sound) warning of danger. v. warn or arouse to a sense of danger or call to a state of preparedness. adj. 1. very attentive or observant 2. mentally responsive 3. not unconscious; especially having become conscious 4. (usually followed by `to') showing acute awareness; mentally perceptive. 
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31. She was alert to the slightest sound.
32. Troops sealed off the site following a bomb alert.
33. The baby is very mentally alert.
34. All the hospitals are on red alert.
35. The rabbIt'seems to be very alert all its life.
36. Alert defenders picked off three of Black's passes.
37. We downgraded the military alert from emergency to standby.
38. Troops were put on high alert.
39. Knowing that danger threatened, they were on the alert.
40. The whole navy was placed on full alert.
41. He had been spotted by an alert neighbour.
42. The security forces are now on full alert.
43. The bank is alert to the danger.
44. You must keep alert in class.
45. A nationwide alert went out for three escaped prisoners.
46. A monkey is very alert in its movements.
47. Drivers must be on the alert for traffic signals.
48. Troops in the vicinity were put on alert .
49. He has an alert mind.
50. The security alert brought the airport to a standstill .
51. A good hunting dog is alert to every sound and movement around.
52. A couple of alert readers wrote in to the paper pointing out the mistake.
53. The armed forces were on high alert to guard against any retaliation.
54. A security alert was issued after four men escaped from the prison.
55. Thousands of police were put on full alert at all main roads leading to the city.
55. Sentencedict.com try its best to gather and create good sentences.
56. Due to a security alert, this train will not be stopping at Oxford Circus.
57. More than 5 000 troops have been placed on alert.
58. The attack was unsuccessful and served only to alert the enemy.
59. Babies are playful and alert when they first wake up.
60. I managed to walk around unchallenged for 10 minutes before an alert nurse spotted me.