what is each role?

with team builder coming out and using the new role system.... what specifically are the roles? and does everyone agree on what they are?

marksman-adc

mage - apc with less burst but other uses like dps (cass), utility (orianna), or tankiness (galio)

assasin - apc with extreme burst who is able to kill someone before they can fight back effectively

tank - meant to soak damage

fighter - bruiser?

support- apc who is extremely low damage but much better utility or tankiness than mages or assasins

anyone disagree with these? still not sure