—n. 1. a small, roundish mark made with or as if with a pen.
2. a minute or small spot on a surface; speck: There were dots of soot on the window sill. 3. anything relatively small or specklike.
4. a small specimen, section, amount, or portion: a dot of butter. 5. Music. a. a point placed after a note or rest, to indicate that the duration of the note or rest is to be increased one half. A double dot further increases the duration by one half the value of the single dot.
b. a point placed under or over a note to indicate that it is to be played staccato.
6. Teleg.a signal of shorter duration than a dash, used in groups along with groups of dashes and spaces to represent letters, as in Morse code.
7. Print.an individual element in a halftone reproduction.
8. on the dot,Informal.precisely; exactly at the time specified: The guests arrived at eight o'clock on the dot. 9. the year dot,Brit. Informal.very long ago.
—v.t. 1. to mark with or as if with a dot or dots.
2. to stud or diversify with or as if with dots: Trees dot the landscape. 3. to form or cover with dots: He dotted a line across the page. 4. Cookery.to sprinkle with dabs of butter, margarine, or the like: Dot the filling with butter.
—v.i. 1. to make a dot or dots.
2. dot one's i's and cross one's t's, to be meticulous or precise, even to the smallest detail.