OPTIONAL

Pronunciation (US):

(GB):

 I. (adjective) 

Sense 1

Meaning:

Possible but not necessary; left to personal choice

Classified under:

Adjectives

Similar:

elective; facultative (not compulsory)

ex gratia (as a favor; not compelled by legal right)

nonmandatory; nonobligatory (not required by rule or law)

Antonym:

obligatory (morally or legally constraining or binding)

Credits