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Phrase(s): spill over
1. [for a container] to overflow. • I hope your bucket of water doesn’t spill over. • The milk glass spilled over because it was filled too full. 2. [for the contents of a container] to overflow. • The bucket is too full. I don’t know why the water doesn’t spill over. • The milk spilled over because you overfilled the glass.
McGrawhill's American Idioms And Phrasal Verbs