Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “speed (sth) up”

speed (sth) up

phrasal verb with speed
 
 
/spiːd/ verb (past tense and past participle sped, speeded)
to move or happen faster, or to make something move or happen faster: Can you try to speed up a bit please?Increasing and decreasing speed of motion
(Definition of speed (sth) up from the Cambridge Learners Dictionary © Cambridge University Press)
Browse related topics

You are looking at an entry to do with Increasing and decreasing speed of motion, but you might be interested in these topics from the Moving quickly and slowly topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “speed (sth) up” in other dictionaries

Word of the Day

yo

used as an informal greeting between people who know each other or as an expression of approval

Word of the Day

Come on – you can do it! Phrasal verbs with ‘come’.

by Liz Walter​,
November 19, 2014
As part of an occasional series on the tricky subject of phrasal verbs, this blog looks at ones formed with the verb ‘come’. If you are reading this blog, I’m sure you already know come from, as it is one of the first things you learn in class: I come from Scotland/Spain.

Read More 

silver splicer noun

November 17, 2014
informal a person who marries in later life Newly retired and now newlywed – rise of the ‘silver splicers’ Reaching pension age becomes a trigger to tie the knot as baby-boomers begin to redefine retirement

Read More