What is Choke ?
Choke is (noun) 1. (in a car.) a valve which increases the flow of air to the engine This model has an automatic choke. 2. a knob on the dashboard which makes this valve work You need to pull out the choke to start the car.(verb) 1. to block something such as a pipe The canal was choked with weeds. 2. to stop breathing properly because a piece of food, e.g., is blocking your windpipe Don’t talk with your mouth full or you’ll choke. He choked on a piece of bread or a piece of bread made him choke.
source: Easier English, Student Dictionary Upper Intermediate Level