Wiktionary (0.00 / 0 votes) Rate this definition: bearing (Noun). A mechanical device that supports another part and/or reduces friction. bearing (Noun). The horizontal angle between the direction of an object and another object, or between it and that of true north; a heading or direction.bearing (Noun).iktionary (0.00 / 0 votes) Rate this definition: bearing (Noun). A mechanical device that supports another part and/or reduces friction. bearing (Noun). The horizontal angle between the direction of an object and another object, or between it and that of true north; a heading or direction. bearing (Noun).