Definitions of spell:

• noun:   a verbal formula believed to have magical force

  Example: "He whispered a spell as he moved his hands"

• noun:   a psychological state induced by (or as if induced by) a magical incantation
• noun:   a time for working (after which you will be relieved by someone else)

  Example: "A spell of work"

• noun:   a period of indeterminate length (usually short) marked by some action or condition

  Example: "A spell of good weather"

• verb:   indicate or signify

  Example: "I'm afraid this spells trouble!"

• verb:   recite the letters of or give the spelling of

  Example: "How do you spell this word?"

• verb:   place under a spell
• verb:   write or name the letters that comprise the conventionally accepted form of (a word or part of a word)

  Example: "He spelled the word wrong in this letter"

• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6200)