From Longman Dictionary of Contemporary Englisheightyeigh‧ty /ˈeɪti/  ●●● W3 number  1 HMNthe number 802  → the eighties3  → be in your eighties4  → in the eighties —eightieth adjective her eightieth birthdayOrigin eighty Old English eahtatig, from eahta “eight” 
                                                    
                                                
