Definitions of foot:

• noun:   travel by foot

  Example: "He followed on foot"

• noun:   any of various organs of locomotion or attachment in invertebrates
• noun:   a support resembling a pedal extremity

  Example: "One foot of the chair was on the carpet"

• noun:   the foot of a human being

  Example: "Armored from head to foot"

• noun:   the lower part of anything

  Example: "Curled up on the foot of the bed"

• noun:   a member of a surveillance team who works on foot or rides as a passenger
• noun:   a linear unit of length equal to 12 inches or a third of a yard
• noun:   a foot of a vertebrate other than a human being
• noun:   a group of 2 or 3 syllables forming the basic unit of poetic rhythm
• noun:   an army unit consisting of soldiers who fight on foot

  Example: "There came ten thousand horsemen and as many fully-armed foot"

• noun:   lowest support of a structure

  Example: "He stood at the foot of the tower"

• verb:   pay for something

  Example: "Foot the bill"

• verb:   add a column of numbers
• verb:   walk
• name:  A surname (very rare: popularity rank in the U.S.: #27703)