—vacuum /ˈvæk.juːm/
noun (EMPTY SPACE)
F0 [C or U] a space from which most or all of the air, gas, or other material has been removed or is not present
Thesaurus+: ↑EmptyF0 [S] a lack of something:
» The withdrawal of troops from the area has created a security vacuum which will need to be filled.Thesaurus+: ↑Lacking things , ↑Scarce, inadequate and not enough , ↑Essential or necessaryin a vacuumF0 kept separate from other people and activities:
» No artist works in a vacuum - we are all of us influenced by others.Thesaurus+: ↑Alone , ↑Separateness and isolation in spacenoun [C] (CLEANER)
► F0 a VACUUM CLEANER(Cf. ↑vacuum cleaner)See picture: vacuum cleaner 
Thesaurus+: ↑Equipment used for cleaning
verb [I or T] (UK ALSO hoover) ↑Verb Endings for vacuum
► F0 to use a vacuum cleaner to collect dust, dirt, etc.: » Vacuum (up) the cake crumbs, would you?Thesaurus+: ↑Cleaning and tidying places and things- -saver
- saver
- save sb's bacon/neck
- save sb's life
- save (sth) up
- save sth up
- save the day
- save up
- save your breath
- save your own skin/hide
- -saving
- saving
- saving grace
- savings
- savings account
- savings and loan association
- savings bank
- saviour
- saviour sibling
- savoir-faire
- savour
- savour of sth
- savoury
- savoy
- savoy (cabbage)