1.
A ~ argument, comment, or idea is based on sensible reasoning.
They put forward many ~ reasons for not exporting...
ADJ: oft it v-link ADJ to-inf
~ity
The editorial in the Financial Times says this argument has lost much of its ~ity.
N-UNCOUNT: usu with poss
2.
Something that is ~ is important or serious enough to make it worth saying or doing.
Most designers share the unspoken belief that fashion is a ~ form of visual art.
ADJ
~ity
...the ~ity of making children wear cycle helmets.
N-UNCOUNT: usu N of n/-ing
3.
If a ticket or other document is ~, it can be used and will be accepted by people in authority.
All tickets are ~ for two months.
ADJ
4.
see also ~ity