1. (

• blink_of_an_eye ,
• flash ,
• heartbeat ,
• instant ,
• jiffy ,
• split_second ,
• trice ,
• twinkling ,
• wink ,
• New_York_minute

) a very short time (as the time it takes the eye to blink or the heart to beat); "if I had the chance I'd do it in a flash" ;

2. (

• moment ,
• minute ,
• second ,
• instant

) a particular point in time; "the moment he arrived the party began" ;

1. (

• instantaneous ,
• instant

) occurring with no delay; "relief was instantaneous"; "instant gratification" ;

2. (

• instant ,
• inst

) in or of the present month; "your letter of the 10th inst" ;

3. (

• clamant ,
• crying ,
• exigent ,
• insistent ,
• instant

) demanding attention; "clamant needs"; "a crying need"; "regarded literary questions as exigent and momentous"- H.L.Mencken; "insistent hunger"; "an instant need" ;