Definitions of loss:

• noun:   the act of losing

  Example: "Everyone expected him to win so his loss was a shock"

• noun:   the disadvantage that results from losing something

  Example: "His loss of credibility led to his resignation"

• noun:   the experience of losing a loved one

  Example: "He sympathized on the loss of their grandfather"

• noun:   the amount by which the cost of a business exceeds its revenue

  Example: "The company operated at a loss last year"

• noun:   something that is lost

  Example: "The car was a total loss"

• noun:   gradual decline in amount or activity

  Example: "Weight loss"

• noun:   euphemistic expressions for death
• noun:   military personnel lost by death or capture
• name:  A surname (very rare: popularity rank in the U.S.: #23630)