Definition of dash verb from the Oxford Advanced Learner's Dictionary

dash

verb
dæʃ
 
; dæʃ
 
 
 

go quickly

1 [intransitive] to go somewhere very quickly
Synonym
rush
I must dash (= leave quickly), I'm late.+ adverb/preposition She dashed off to keep an appointment.He dashed along the platform and jumped on the train.
 

throw/beat

2 [transitive, intransitive] to throw something or make something fall violently onto a hard surface; to beat against a surfacedash something + adverb/preposition The boat was dashed repeatedly against the rocks.+ adverb/preposition The waves were dashing against the harbour wall.
Idioms

dash somebody's hopes

to destroy somebody's hopes by making what they were hoping for impossible
Hopes of a peaceful settlement have been dashed.

dash (it)!

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dash it all!

(old-fashioned, British English) used to show that you are annoyed about something
Phrasal verbs

dash something off

to write or draw something very quicklyI dashed off a note to my brother.