1. (

• meaningless ,
• nonmeaningful

) having no meaning or direction or purpose; "a meaningless endeavor"; "a meaningless life"; "a verbose but meaningless explanation" ;

2. (

• futile ,
• ineffectual ,
• otiose ,
• unavailing ,
• meaningless

) producing no result or effect; "a futile effort"; "the therapy was ineffectual"; "an otiose undertaking"; "an unavailing attempt" ;