Definitions of tongue:

• noun:   the flap of material under the laces of a shoe or boot
• noun:   a mobile mass of muscular tissue covered with mucous membrane and located in the oral cavity
• noun:   a manner of speaking

  Example: "He spoke with a thick tongue"

• noun:   the tongue of certain animals used as meat
• noun:   any long thin projection that is transient

  Example: "Tongues of flame licked at the walls"

• noun:   metal striker that hangs inside a bell and makes a sound by hitting the side
• noun:   a human written or spoken language used by a community; opposed to e.g. a computer language
• noun:   a narrow strip of land that juts out into the sea
• verb:   lick or explore with the tongue
• verb:   articulate by tonguing, as when playing wind instruments
• name:  A surname (very rare: popularity rank in the U.S.: #24145)