INSIDER Meaning of INSIDER in English insider BrE AmE ˌɪn ˈsaɪd ə ◂ AmE \ - ə r▷ insider|s z▶ in ˌ sider ˈ trading, ˌ•ˌ•• ˈ•• BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012