Read the dictionary definition of tiller. All definitions for this word.
1. a farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture)
2. lever used to turn the rudder on a boat
3. someone who tills land (prepares the soil for the planting of crops)
4. a shoot that sprouts from the base of a grass
5. grow shoots in the form of stools or tillers