So I have a flaw! Big deal! Like Joey's constant knuckle-cracking isn't annoying? And Ross, with his over-pronouncing every single word? And Monica, with that snort when she laughs? I mean, what the hell is that thing? ...I accept all those flaws, why can't you accept me for this? ---《friends》Episode of three of Season one
The birth rate in this city is almost constant.
He hates his wife's constant nagging.
He remained constant till death.
名词 n. [C]
The speed of light is an important constant.