[{"Bold_text": "adjective", "List Items": ["fully aware and attentive; wide-awake; keen:She had an alert mind.Synonyms: observant , wary , awake Antonyms: unaware", "swift; agile; nimble.Synonyms: spirited , sprightly , active , quick , lively , brisk"]}, {"Bold_text": "noun", "List Items": ["an attitude of vigilance, readiness, or caution, as before an expected attack.", "a warning or alarm of an impending military attack, a storm, etc.:We'd just boarded the bus when the alert sounded.", "the period during which such a warning or alarm is in effect."]}, {"Bold_text": "verb (used with object)", "List Items": ["to warn (troops, ships, etc.) to prepare for action.", "to warn of an impending raid, attack, storm, etc.:The radio alerted coastal residents to prepare for the hurricane.", "to advise or warn; cause to be on guard:to alert gardeners to the dangers of some pesticides."]}]