A nova known to have had two or more outbursts. The interval between outbursts typically ranges between 10 and 80 years. It is possible that all novae are recurrent and that only the ones with the shortest periods are recognized. However, the known recurrent novae differ from classical novae in that their amplitudes of six to eight magnitudes are smaller, and their spectra during outbursts are different. At other times their spectra seem to indicate the presence of a red giant in the system.