Meaning of “fill (sth) up” in the English Dictionary

british dictionary

"fill (sth) up" in British English

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fill (sth) up

phrasal verb with fill uk /fɪl/ us /fɪl/ verb

B1 to become full, or to make something become full:

The seats in the hall were filling up fast.
He filled up the tank with petrol.

More examples

  • The waiter immediately filled my glass up again.
  • Fill the bucket up with warm soapy water.
  • Don't fill the cup up so full next time.
  • This container fills up with rainwater and we use it to water the houseplants.
  • I'm glad to see that our charity collection boxes are filling up nicely.

(Definition of “fill (sth) up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)