Definitions of till:

noun: unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
noun: a strongbox for holding cash
noun: a treasury for government funds
verb: work land as by ploughing, harrowing, and manuring, in order to make it ready for cultivation
Example: "Till the soil"
name: A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #7936)