Definitions of express:

• noun:   rapid transport of goods
• noun:   public transport consisting of a fast train or bus that makes a limited number of scheduled stops

  Example: "He caught the express to New York"

• noun:   mail that is distributed by a rapid and efficient system
• verb:   manifest the effects of (a gene or genetic trait)

  Example: "Many of the laboratory animals express the trait"

• verb:   articulate; either verbally or with a cry, shout, or noise

  Example: "She expressed her anger"

• verb:   give expression to
• verb:   send my rapid transport or special messenger service

  Example: "She expressed the letter to Florida"

• verb:   indicate through a symbol, formula, etc.

  Example: "Can you express this distance in kilometers?"

• verb:   obtain from a substance, as by mechanical action

  Example: "Italians express coffee rather than filter it"

• verb:   serve as a means for expressing something
• adjective:   not tacit or implied

  Example: "Her express wish"

• adjective:   without unnecessary stops

  Example: "An express train"

• adverb:   by express

  Example: "Please send the letter express"