Definitions of pill:

• noun:   a dose of medicine in the form of a small pellet
• noun:   something that resembles a pill in shape or size
• noun:   a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception
• noun:   something unpleasant or offensive that must be tolerated or endured

  Example: "His competitor's success was a bitter pill to take"

• noun:   a unpleasant or tiresome person
• name:  A surname (very rare: popularity rank in the U.S.: #37146)