tiller (Noun) — Lever used to turn the rudder on a boat.
tiller (Noun) — A shoot that sprouts from the base of a grass.
tiller (Noun) — Someone who tills land (prepares the soil for the planting of crops).
tiller (Noun) — A farm implement used to break up the surface of the soil (for aeration and weed control and conservation of moisture).
tiller (Verb) — Grow shoots in the form of stools or tillers.