ETYM Old Eng. souldier, soudiour, souder, Old Fren. soldier, soldoier, soldeier, sodoier, soudoier, soudier, from Latin solidus a piece of money (hence applied to the pay of a soldier), from solidus solid. Related to Solid, Sold.
1. A wingless sterile ant or termite having a large head and powerful jaws adapted for defending the colony.
2. An enlisted man or woman who serves in an army.

1. City in Iowa (USA); zip code 51572.
2. City in Kansas (USA); zip code 66540.

To serve as a soldier in the military.