1. The system of intermediaries between the producers, suppliers, consumers, etcetera, for the movement of a good or service. 
2. The technical range between support and resistance levels that a stock price has traded in for a specific period of time.
 
 
1) There are different types and flavors of channels. Examples are sale channels, distribution channels, Internet channels, and so forth. 
2) A breakout of a technical channel is seen as a bullish (on an upward breakout) or bearish signal (on a downward breakout).