connected by participation or association or use; "we accomplished nothing, simply because of the large number of people involved"; "the problems involved"; "the involved muscles"; "I don't want to get involved"; "everyone involved in the bribery case has been identified"
highly involved or intricate; "the Byzantine tax structure"; "convoluted legal language"; "convoluted reasoning"; "intricate needlework"; "an intricate labyrinth of refined phraseology"; "the plot was too involved"; "a knotty problem"; "got his way by labyrinthine maneuvering"; "Oh, what a tangled web we weave"- Sir Walter Scott; "tortuous legal procedures"; "tortuous negotiations lasting for months"
The building area, room, or structure either actually enveloped in the flame and smoke of a fire, or in danger of such involvement. As "firefighters were unable to save building involved but succeeded in preventing extension of the fire".