noun, noun which may take the genitive case particle 'no'
usual state of things; ordinary course; way things normally are
A noun and の-adjectival use for what is normal, usual, or the expected course of things. Often appears in set phrases such as 世の常, meaning 'the way of the world.'
It is the way of the world for people's feelings to change.
He makes it a habit to take a walk every morning.
You must not accept this as the normal state of affairs.
It is usually the case that this region gets a lot of snow in winter.
恒常 is a more formal noun meaning constancy or a steady, unchanging state, while 常 refers more broadly to the ordinary course of things.
異常 means 'abnormal' or 'unusual', the direct opposite of 常, which refers to the normal, usual state of things.
Standard and common kanji spelling for つね in the sense of the ordinary or usual state of things.
Attested alternative spelling, but uncommon as a standalone つね; 恒 is more familiar in compounds expressing constancy.
つね is a native Japanese word conventionally written with 常 for normality or constancy. The alternative 恒 also conveys constancy, but its standalone use for つね is uncommon; the precise historical development is not specified.