to go or happen faster, or to cause something to happen faster: The car suddenly sped up and went through a red light. He developed a new system to help speed up the work.

From Longman Dictionary of Contemporary English speed up phrasal verb to move or happen faster, or to make something move or happen faster OPP slow down The truck speeded up going down the hill. speed something ↔ up The new system will speed up the registration process. → speed → See Verb table Examples from the Corpus speed up • I'll phone the manager and get them to speed things up.