1 : a symbol, letter, digit, or mark used to represent, control, or organize information. [SEMATECH] 2 : a byte sent on a SECS-I serial line. NOTE-Data is transmitted or received in a serial bit stream of 10 bits per character at one of the specified data rates. The standard character has one start bit (0), eight data bits, and one stop bit (1). [SEMI E4-91]