jacknoun [ C ]
uk/dʒæk/us/dʒæk/jack noun [ C ] (EQUIPMENT)
a piece of equipment that can be opened slowly under a heavy object such as a car in order to raise it off the ground:
You need a car jack in order to change a tyre.
Thesaurus: synonyms and related words
Machines - general words
- 3-D printer
- automatic
- backhoe
- bot
- cash machine
- cement mixer
- cloud chamber
- compactor
- contraption
- cotton gin
- crank
- derrick
- gadget
- humidifier
- lift
- Mk
- rotor
- selector
- sensitive
- vending machine
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jack noun [ C ] (CARD)
also knave a playing card with a picture of a man on it. It has a lower value than the cards showing a king or queen:
the jack of clubs
Thesaurus: synonyms and related words
Card games
- bridge
- canasta
- card sharp
- deal
- dealer
- diamond
- discard
- flush
- grand slam
- joker
- pass
- pool
- royal flush
- rummy
- shuffle
- singleton
- solitaire
- stick
- strip poker
- suit
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jack noun [ C ] (BALL)
a small ball towards which other balls are rolled or thrown in the games of bowls or boules
Thesaurus: synonyms and related words
Bowls, bowling & croquet
- boules
- bowl
- bowling
- bowling alley
- bowling ball
- bowling green
- croquet
- lawn bowling
- mallet
- skittle
- tenpin bowling
- tenpins
jack noun [ C ] (ELECTRICAL)
a connection between two pieces of electrical equipment
Thesaurus: synonyms and related words
Electrical switches & connections
- connector
- cord
- cordless
- dimmer
- dimmer switch
- dip switch
- docking station
- electrical outlet
- ground
- jack plug
- plug (sth) in/plug (sth) into sth
- push-button
- put sth on
- put sth out 1
- remote control
- shaver point
- socket
- switch
- wiring
- zapper
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