noun
off-season; out of season
Refers to produce, seafood, or other seasonal items that are not at their peak season. Can also describe timing that is not ideal for a particular activity.
旬外れの野菜は味が落ちることがある。
Off-season vegetables can sometimes lack flavor.
この魚は旬外れなので、あまり美味しくない。
This fish is out of season, so it's not very tasty.
Compound of 旬 (shun, 'seasonal peak') and 外れ (hazure, 'miss, deviation'). The reading じゅん is a variant of しゅん.