noun

an external form, appearance, or manner of presentation, typically concealing the true nature of something.

he visited in the guise of an inspector

likeness,external appearance,appearance,semblance,form,outward form,shape,image,aspect,disguise,false colours,costume,clothes,outfit,dress,pretence,false show,false front,false display,show,front,facade,illusion,cover,blind,screen,smokescreen,masquerade,posture,pose,act,charade,put-on,put-up job