What is the meaning of Significant?

Signifying something; carrying meaning.

Having a noticeable or major effect.

Reasonably large in number or amount.

Having a covert or hidden meaning.

Having a low probability of occurring by chance (for example, having high correlation and thus likely to be related).

Of a digit or figure, see significant figure.

That which has significance; a sign; a token; a symbol.

gerund of significar

third-person plural present active indicative of significō

Source: wiktionary.org