ಅರ್ಥ : The state of something that has outlived its relevance.
ಸಮಾನಾರ್ಥಕ : non-issue
ಅರ್ಥ : Mail that can neither be delivered nor returned.
ಸಮಾನಾರ್ಥಕ : dead mail
Dead letter ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Dead letter ka matlab kya hota hai?