漏掉 (lòu diào) is a verb meaning 'to omit' or 'to miss' — something that should have been included, noticed, or done is accidentally left out. The character 漏 (lòu) originally means 'to leak' or 'to let slip through', suggesting unintentional loss or escape; 掉 (diào) adds the sense of 'falling off' or 'being lost'. Together, they emphasize accidental exclusion — not deliberate skipping, but an oversight due to carelessness, haste, or distraction.

This word is commonly used in everyday contexts like proofreading, scheduling, studying, or following instructions. It often appears with objects such as names, steps, details, appointments, or items on a list. While neutral in register, it carries a slight connotation of regret or mild fault — for example, you might say 漏掉了一页 (‘I missed a page’) when reviewing a document, implying you’ll need to correct it. It’s not used for permanent or intentional omissions (for which you’d use 省略 or 删掉), nor for physical loss like dropping an object (that’s 掉).