1.Definition: disinclined to work or exertion

Related Adjective(s):faineant, indolent, lazy, slothful

2.Definition: producing no result or effect

"An otiose undertaking"

Related Adjective(s):futile, ineffectual, meaningless, unavailing

3.Definition: serving no useful purpose; having no excuse for being

"Otiose lines in a play"

Related Adjective(s):pointless, purposeless, senseless, superfluous, wasted