From Longman Dictionary of Contemporary Englisherraticer‧rat‧ic /ɪˈrætɪk/ adjective CHANGE/BECOME DIFFERENTsomething that is erratic does not follow any pattern or plan but happens in a way that is not regular His breathing was becoming erratic. his erratic behaviour —erratically /-kli/ adverb He always drives erratically.
Examples from the Corpus
erratic• Her behaviour was becoming more and more erratic.• And Laura begins to wonder why her husband has become so erratic.• But when it comes to his fellow-countrymen and old school contemporaries, he becomes worryingly erratic.• Ames had long been erratic and unhappy in his professional and personal lives.• He said she acted erratic, got the shakes one evening and almost had a nervous breakdown.• Given an unsuitable feeding place, they may become erratic in their response to food.• A muscle near her right cheekbone fluttered at erratic intervals, and the nail polish was chipped.• I listened to the raven songs, and my eyes followed others in their erratic journeys all over the pastel landscape.• The company's erratic performance is a cause for some concern.• Heating was difficult owing to erratic supplies of gas, electricity and water.• The erratic winds made fighting the fire more difficult.• The results of the rest of the sale were wildly erratic with 36 percent left unsold.From Longman Business Dictionaryerraticer‧rat‧ic /ɪˈrætɪk/ adjective having no pattern or plan, making it difficult to know what is going to happenErratic currency markets led to intervention by the major central banks.the erratic performance of exportsOrigin erratic (1300-1400) Old French erratique, from Latin errare; → ERR 