noun
plural hinges
[count] :a usually metal piece that attaches a door, gate, or cover to something and allows it to open and close - see picture at door
verb
hinges; hinged; hinging
[+ obj] :to attach (a door, gate, or cover) by hinges - usually used as (be) hinged
hinge on
also hinge upon [phrasal verb]
hinge on/upon (something) :to be determined or decided by (something) :to depend on (something)
US