Adjective

(en adjective)

Requiring urgent attention.

* {{quote-magazine, date=2013-06-21, author=(Oliver Burkeman)

, volume=189, issue=2, page=27, magazine=(The Guardian Weekly) , title= The tao of tech , passage=The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about "creating compelling content", or offering services that let you "stay up to date with what your friends are doing", "share the things you love with the world" and so on.}}

Forceful.

* {{quote-news, year=2011, date=October 29, author=Phil McNulty, work=BBC Sport

, title= Chelsea 3-5 Arsenal , passage=Terry's goal looked to have put Chelsea in control on the stroke of half-time but Arsenal's response presented a compelling case for Wenger's insistence that reports of his side's demise have been greatly exaggerated.}}

Adjective

(en-adj)

That can be justified.

* 1917 , Albert Einstein, Relativity: The Special and General Theory , Part II.

''It was at all times clear that, from the point of view of the idea it conveys to us, every motion must be considered only as a relative motion. Returning to the illustration we have frequently used of the embankment and the railway carriage, we can express the fact of the motion here taking place in the following two forms, both of which are equally justifiable :

''(a) The carriage is in motion relative to the embankment,

''(b) The embankment is in motion relative to the carriage.

In (a) the embankment, in (b) the carriage, serves as the body of reference in our statement of the motion taking place. —