abbr. Department of Transport. dot n. 1 a small spot or mark. b this as part of i or j, or as a decimal point etc. 2 shorter signal of the two in Morse code. v. (tt) 1 a mark with dot(s). b place a dot over (a letter). 2 (often foil. by about) scatter like dots. 3 partly cover as with dots (sea dotted tIiith ships). 4 slang hit.
