genuine and acceptable because made or done with the correct formalities; that can be legally used; (of arguments, reasons etc) acceptable
right, genuine
Cases of word usage
1) to acknowledge something as true or valid (admit)
2) to make (a written agreement, guarantee etc) not valid (invalidate)
3) done, happening etc once a month; valid for one month (monthly)
4) not valid (null)
5) no longer in fashion, in use or valid (out-of-date)
6) to end, reject (something) as not valid (by legal procedure) (quash)
7) to make (something) valid (validate)
