(astronomy) A catalogue number used to identify any one of more than one hundred galaxies, nebulae, and other deep-sky objects visible in the night sky; the designation formed by the surname Messier or letter M being prepended to the number, as in Messier 31 or M31 (the Andromeda Galaxy).

(astronomy) A catalogue of deep sky objects compiled in the 1880s by J. L. E. Dreyer using observations mostly from William Herschel. It contains nearly 8,000 objects, known as the NGC objects. Objects in the catalogue are numbered, and the letters NGC are prepended to these numbers, as in NGC 224 (the Andromeda Galaxy) or NGC 6205 (the globular cluster in Hercules).

A natural or artificial egg placed in a bird's nest, to encourage the bird to lay its own eggs there. / (figuratively) A saving; a reserve of money. / An egg squash.

An occasion when a performer or team of them (especially in vaudeville) expects to perform at a theater for a single evening.

(simile, colloquial, Ireland) Furiously or vigorously, repeatedly.

(idiomatic, slang) Someone or something which is annoying, irritating or inconvenient.

(chemistry) nitric acid

(idiomatic) To be unable to say a single word because of someone else's talkativeness.

The official capital of Benin. The de-facto capital is Cotonou. / Former name of Parangipettai.

(mathematics) a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10