1. Morse Code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
2. Morse code is a method of sending text messages by keying in a series of electronic pulses, usually represented as a short pulse (called a "dot") and a long pulse (a "dash").
https://en.wikipedia.org/wiki/Morse_code#International_Morse_Code (1.); http://searchnetworking.techtarget.com/definition/Morse-code (2.)