I ‧ a ‧ go /iˈɑːɡəʊ/ BrE AmE
a character in the play ↑ Othello by William ↑ Shakespeare . Iago is an evil man who deliberately lies and tells Othello that ↑ Desdemona , Othello's wife, is having a sexual relationship with another man, and as a result Othello kills her.