Of, relating to, or befitting a friend: friendly advice. Favorably disposed; not antagonistic: a government friendly to our interests. Warm; comforting. User-friendly. Informal Easy to understand or use for a specified agent. Often used in combination: a reader-friendly novel; a consumer-friendly policy. In the manner of a friend; amicably. Informal One fighting on or favorable to one's own side: "If I read this right, you're the only friendly we have there right now\u201d ( Tom Clancy).