kiss

A touch with the lips, usually to express love or affection, or as a greeting.

An 'X' mark placed at the end of a letter or other type of message, signifying the bestowal of a kiss from the sender to the receiver.

A type of filled chocolate candy, shaped as if someone had kissed the top. See Hershey's Kisses.

(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.