1. (

• functional ,
• usable ,
• useable ,
• operable ,
• operational

) fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order" ;

2. (

• useable ,
• usable

) capable of being put to use; "usable byproducts" ;

3. (

• available ,
• usable ,
• useable

) convenient for use or disposal; "the house is available after July 1"; "2000 square feet of usable office space" ;