The stage of the market where money flows into altcoins rather than the larger established protocols. During alt-season money often flows from BTC or ETH into smaller assets.
Altseasons' often occurs after a bull-market starts and traders are looking to diversify their main holding gains into diversified crypto assets. This in turn causes rapid increases to the lower-cap coins, causing an avalanche of new investment looking to join in on the gains.
* All terms and definitions may update as the Cryptionary improves.