Definition of on–off in English:

on–off

Syllabification: on–off
Pronunciation: /ˌänˈôf
 
/

adjective

1(Of a switch) having two positions, “on” and “off.”.
More example sentences
  • Power is preferably supplied to the at least two tilt switches through at least one battery and an on-off switch.
  • Anyone who has struggled to find the on-off switch on the computer will appreciate a new technology being developed by researchers at the Department of Engineering.
  • Though a tad awkward to use, the on-off switch on the back of the device lets you play songs in order, which you might want to do, say, if you just bought a new album.
2(Of a relationship) not continuous or steady.
More example sentences
  • However, the couple had continued with an on-off relationship and Mr Boyes sometimes stayed over at the house.
  • Meanwhile, Godfrey's on-off relationship with the sick room is continuing as the 14-try winger is struggling with tonsillitis, having shaken off a stubborn hamstring strain.
  • The Formula One boss, who has had a turbulent on-off relationship with the British beauty, set tongues wagging after it emerged he planned to host a lavish 35th birthday party for the beauty aboard his yacht in Cannes last.

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Word of the day demoralize
Pronunciation: dəˈmôrəˌlīz
verb
cause (someone) to lose confidence or hope; dispirit