[mastermind] {n.} A person who supplies the intelligence for a project […]

[mat] See: [WELCOME MAT IS OUT].

[matelot] {n.} Sailor (from the French).

[matter] See: [FOR THAT MATTER], [LAUGHING MATTER], [NO MATTER], [THE MATTER].

[matter of course] {n. phr.} Something always done; the usual way; […]

[matter of fact] {n. phr.} Something that is really true; something […]

[matter of opinion] {n. phr.} Something that may or may not […]

[matter of record] {n. phr.} A fact or event that is […]

[matter-of-fact] {adj.} 1. Simply telling or showing the truth; not explaining […]

[may] See: [BE THAT AS IT MAY], [COME WHAT MAY], [LET […]