Maat

1. M, the thirteenth letter of the English alphabet, is a vocal consonant, and from the manner of its formation, is called the labio-nasal consonant. See Guide to Pronunciation, §§ 178-180, 242.
2. As a numeral, M stands for one thousand, both in English and Latin.
3. (Print.) A quadrat, the face or top of which is a perfect square; also, the size of such a square in any given size of type, used as the unit of measurement for that type: 500 m's of pica would be a piece of matter whose length and breadth in pica m's multiplied together produce that number.
4. (law) A brand or stigma, having the shape of an M, formerly impressed on one convicted of manslaughter and admitted to the benefit of clergy.
5. A child's word for mother.
6. In Oriental countries, a respectful form of address given to a woman; mother.
7. A slattern.
8. portraying human injury or death in a way so as to inspiring shock or horror; gruesome; ghastly; as, macabre tortures conceived by madmen.
9. Pertaining to or portraying the grim aspects of death, or the allegorical dance of death.
10. A paved surface formed of compressed layers of broken rocks held together with tar.
11. paved with macadam{2}.
1. The sparrow hawk.
2. The kestrel.

The letter M came into English from the Greek, through the Latin, the form of the Greek letter being further derived from the Phœnician, and ultimately, it is believed, from the Egyptian. Etymologically M is related to n, in lime, linden; emmet, ant; also to b. 1913 Webster M is readily followed by b and p. the position of the lips in the formation of both letters being the same. The relation of b and m is the same as that of d and t to n. and that of g and k to ng.