Phase doorway - an entrance on the backstage spot of theater; utilized by performers and also other theater personnel encroachment, intrusion, invasion - any entry into a region not Formerly occupied; "an invasion of tourists"; "an invasion of locusts" keep - hold the attention of; "The soprano held the viewers"; https://entrance-mats02233.thenerdsblog.com/43795916/not-known-factual-statements-about-entrance-mats