Platform Vs Service

There is confusing in my mind to actually figure out what do you actually mean by a platform and what is a service ?
My visualization is getting a little blurred because of the confusion ...
A platform is a concrete space available for doing something. Launch a service ..may be...
A service is focused around a customer where you deliver value for some return.
Actually these definitions are also vague in my mind...
A want to see myself as a platform but always my definition about me happens as a service ... will update this space once a clarity emerges..