Real Dictionary

jib
countable noun: The jib is the small triangular sail that is sometimes used at the front of a sailing boat.
verb: If you jib at something, you are unwilling to do it or to accept it.

jib in American English 1
an animal that jibs, as a horse
to stop and refuse to go forward; balk
noun: any of various triangular sails set forward of a forestaysail or fore-topmast staysail

jib in American English 2
the projecting arm of a crane
noun

jib in American English 3
a triangular sail secured to a stay forward of the mast or foremast
to jibe (a sail or boom)
intransitive verb: to move restively sidewise or backward instead of forward, as an animal in harness; balk
noun: a horse or other animal that jibs

jib in American English 4
noun: the projecting arm of a crane

jib in British English 1
noun: any triangular sail set forward of the foremast of a vessel

jib in British English 2
verb: to be reluctant (to); hold back (from); balk (at)

jib in British English 3
noun: the projecting arm of a crane or the boom of a derrick, esp one that is pivoted to enable it to be raised or lowered

jib in British English 4
noun: a contortion of the face; a face