Learner's definition of DEVICE
1 : an object, machine, or piece of equipment that has been made for some special purpose
The store sells TVs, VCRs, and other electronic devices.
a hidden recording device
2 : a weapon that explodes 3 : something that is done in order to achieve a particular effect 4 : something in a book, play, poem, movie, etc., that is used to achieve a particular effect
leave you to your own devices
◊ If someone leaves you to your own devices or you are left to your own devices, you are allowed to do what you want or what you are able to do without being controlled or helped by anyone else.
The students were left to their own devices when the teacher failed to appear on time.
Left to its own devices, the school would accept only the most advanced students.