AM noun 7adverb 1forms 1 noun7 •Member of the Order of Australia. •Initialism of amplitude modulation; radio programming broadcasted in this form.That station is available on both AM and FM.They were listening to AM and complaining about the static. •Initialism of Master of Arts. •(UK, historical) Initialism of Assembly Member, a title similar to MP, placed after the name of a Member of the Welsh National Assembly. •Initialism of additive manufacturing.The system, says Freeman is currently being used to assess exactly how AM powders pack and flow to ensure process efficiency and consistent product quality. — 2015 •Abbreviation of Amazonas: a state of Brazil. •Initialism of automated mapping, used in conjunction with Facilities Managements abbreviations (AM/FM). adverb1 •Initialism of anno mundi formsAMs