Learner's definition of EXPOSURE
1 [noncount] : the fact or condition of being affected by something or experiencing something : the condition of being exposed to something
exposure to heat/cold
exposure to infection/danger
children's exposure to violence on television
He risks exposure to ridicule by saying such things in public.
2 [noncount] : the act of revealing secrets about someone or something — often + of 3 [noncount] : public attention and notice
4 a : the amount of time during which light is allowed to enter a camera in order to produce a photograph b : a section of a film used for a single photograph 5 [noncount], medical : a condition that results from being outside in cold weather for a long time 6 [count] : a position that provides a view in a specified direction