verb

• (transitive) To touch with the lips or press the lips against, usually to show love or affection or passion, or as part of a greeting.
  "He […] kissed her lips with such a clamorous smack, / That at the parting all the church echoed."
• (ambitransitive) To (cause to) touch lightly or slightly; to come into contact.
  "The nearside of the car just kissed a parked truck as he took the corner at high speed."
• (reciprocal) Of two or more people, to touch each other's lips together, usually to express love or affection or passion.
  "We're kissing in the moonlight / Love was shining so bright and true"
• (transitive, archaic) To treat with fondness.

noun

• (astronomy) The alignment of two bodies in the solar system such that they have the same longitude when seen from Earth; conjunction.
• (aviation) A low-speed mid-air collision between the envelopes of two hot air balloons, generally causing no damage or injury.