CPM is frequently used in advertising to represent cost per thousand (where M is the roman numeral of 1000). When used in advertising it relates to the cost per thousand page impressions. It may also refer to: Project Management Critical Path Method Comedy Cash prize monies Commerce Cost per impression Certified Property Manager Corporate performance management Cost per mille Effective cost per mille Organizations Communist Party of India (Marxist) Communist Party of Malaya Compton/Wood… (More on Cpm)