1. (

• gratuitous

) without cause; "a gratuitous insult" ;

2. (

• complimentary ,
• costless ,
• free ,
• gratis ,
• gratuitous

) costing nothing; "complimentary tickets"; "free admission" ;

3. (

• gratuitous ,
• needless ,
• uncalled-for

) unnecessary and unwarranted; "a strikers' tent camp...was burned with needless loss of life" ;