1. Arbitrary: (adjective)
Definition:
having unlimited power; 
uncontrolled or unrestricted by law
not planned or chosen for a particular reason; not based on reason or evidence.

2. Arbitrary
Pronunciation:
[ahr-bi-trer-ee] 

3. Arbitrary Synonyms: irresponsible erratic inconsistent irrational
frivolous
Antonyms:
reliable
logical
consistent
rational
sensible

4. Arbitrary
Related Forms:
Adjective
arbitrarily

5. Arbitrary USED IN A Sentence.
USED IN A Sentence
We made an arbitrary choice to eat at the first restaurant we saw.

6. Arbitrary

7. Arbitrary