■ noun
1》 a thing that is or may be chosen.
↘the freedom or right to choose.
2》 a right to buy or sell a particular thing at a specified price within a set time.
■ verb buy or sell an ~ on.
Phrases
keep (or leave ) one's ~s open not commit oneself.
Origin
C16: from Fr., or from L. optio(n-) , from the stem of optare 'choose'.