(aviation) An aerial salute to commemorate a deceased person, consisting of a formation of flying aircraft with a space where one plane should be flying.

plural of missing man formation

(mathematics) A discrete-time dynamical system that maps one point to another on the plane, known for exhibiting chaotic behavior.

plural of master baiter

(humorous) A masturbator; someone who masturbates.

(chess) A checkmate pattern in which a queen, supported by a piece of its same color, is placed diagonally adjacent to the enemy king. The two flight squares that the queen does not control are occupied by pieces of the king's own color.

(chess) A checkmate delivered by a pawn.

(obsolete) A man who owns a monkey or monkeys; an organ grinder who keeps a pet monkey as part of his attraction.

(chess) A checkmate delivered by a major piece along the back rank against a king whose advancement is prevented by pieces of its own color (most commonly pawns).

(historical) matting manufactured from the inner bark of the linden-tree