Something beyond compare; a thing with which there is no comparison.
Not able to be compared.
So much better than another as to be beyond comparison; matchless or unsurpassed.
That which has significance; a sign; a token; a symbol.
Reasonably large in number or amount.
Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).
Having a covert or hidden meaning.
Having a noticeable or major effect.
Signifying something; carrying meaning.