plural of Meg

A diminutive of the female given names Margaret or Megan.

A large cannon; specifically, the large 15th cannon at Edinburgh Castle (more usually called ‘Mons Meg’), or the cannon used to defend Londonderry during the siege of 1688-9.

plural of Roaring Meg

(informal) Very large. / (slang) Great; excellent.

(informal) extremely

(mathematics) The Steinhaus-Moser number ②

(originally) Very large, great. / In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by one million (10⁶.) SI Symbol: M.

Alternative spelling of megaohm

One affected with or exhibiting megalomania.