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To cause something to become obstructed or filled such that nothing can get through. In this usage, a noun or pronoun can be used between "plug" and "up." Ugh, there's a huge wad of gunk and hair …

Jan 10, 2026 · Let's start with the basics — what does "plug up" actually mean? To completely fill or block a hole or opening so that nothing can pass through. Think of "plug up" as the act of sealing, …

Synonyms for PLUG (UP): stop (up), block, obstruct, gum (up), jam, fill, choke, stuff; Antonyms of PLUG (UP): open (up), free, clear, hollow (out), unplug, scoop (out), excavate, unblock

PLUG UP definition: to become plugged | Meaning, pronunciation, translations and examples

plug up definition: block a hole or gap with a plug. Check meanings, examples, usage tips, pronunciation, domains, related words.

to connect or become connected by or as if by means of a plug: The device will plug into any convenient wall outlet. The proposed new departments would eventually plug into the overall organizational plan.

plug up (third-person singular simple present plugs up, present participle plugging up, simple past and past participle plugged up) (transitive) To put a plug or bung into something; to interrupt the flow of.

Examples He used a towel to plug up the leak in the sink. If we don’t plug up those holes, the cold air will come in. The workers will need to plug up the drain to fix the pipe properly.

Learn the definition of 'plug up'. Check out the pronunciation, synonyms and grammar. Browse the use examples 'plug up' in the great English corpus.