Air that has been heated, especially so as to function as the lifting agent of a hot-air balloon.
Empty, confused, or exaggerated talk lacking meaning or substance; bluster.
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.