dot-matrix UK /ˈdɒt ˌmeɪtɹɪks/US /ˈdɑt ˌmætɹɪks/adjective 1dot matrix noun 2forms 2 adjective1 •That functions by use of a dot matrix dot matrix noun2 •[before a noun] A two-dimensional array or pattern of dots used (for example, by a display device or a printer) to represent alphanumeric characters and pictures.On most terminals, hardware-generated characters are displayed as dot matrixes inside rectangular envelopes[…]. The exact manner in which this is done depends on the kind of terminal. — 1980 •Clipping of dot matrix printer.Jed S., the MIT student who took my poetry class at Wellesley and presented his poems on long scrolls of computer paper, the all-capitals dot matrix lines nearly unreadable. — 2011 formsdot matrices · dot matrixes