prevocalic variant of meso-

plural of ME

(astronautics) Initialism of main engine start.

(followed by "or") Is it a situation of my own imagination (or ...)?

(Internet slang, humorous) This represents me or my feelings.

(computing, humorous) I (the person writing)

Any of the flowering plants of the genus Myosotis, mostly with a small five-petalled blue flower. / A light tint of blue, the color of the flower.

(idiomatic) what are the advantages of (something) to me, personally?

That applies to me as well.

(Internet slang, Usenet) To agree with someone.