n.

1. a wooden structure consisting of an upright post with a transverse piece
2. a marking that consists of lines that cross each other;
   crisscross, mark
3. a representation of the structure on which Jesus was crucified; used as an emblem of Christianity or in heraldry;
   Cross
4. any affliction that causes great suffering;
   crown of thorns
   
   • that is his cross to bear
   • he bears his afflictions like a crown of thorns
5. an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species;
   hybrid, crossbreed
   
   • a mule is a cross between a horse and a donkey
6. (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids;
   hybridization, hybridisation, crossbreeding, crossing, interbreeding, hybridizing

v.

1. travel across or pass over;
   traverse, track, cover, pass over, get over, get across, cut through, cut across
   
   • The caravan covered almost 100 miles each day
2. meet at a point;
   intersect
3. hinder or prevent  (the efforts, plans, or desires) of;
   thwart, queer, spoil, scotch, foil, frustrate, baffle, bilk
   
   • What ultimately frustrated every challenger was Ruth's amazing September surge
   • foil your opponent
4. fold so as to resemble a cross
   
   • she crossed her legs
5. to cover or extend over an area or time period;
   traverse, span, sweep
   
   • Rivers traverse the valley floor", "The parking lot spans 3 acres
   • The novel spans three centuries
6. meet and pass
   
   • the trains crossed
7. trace a line through or across
   
   • cross your `t'
8. breed animals or plants using parents of different races and varieties;
   crossbreed, hybridize, hybridise, interbreed
   
   • cross a horse and a donkey
   • Mendel tried crossbreeding
   • these species do not interbreed

adj.

1. extending or lying across; in a crosswise direction; at right angles to the long axis;
   cross(a), transverse, transversal, thwartwise
   
   • cross members should be all steel
   • from the transverse hall the stairway ascends gracefully
   • transversal vibrations
   • transverse colon
2. perversely irritable;
   crabbed, crabby, fussy, grouchy, grumpy, bad-tempered, ill-tempered