Decline is a regular verb. Its past and past participle forms are declined and declined.
To decline an offer is to reject it.
- I decline to support such a wild scheme.
- The Minister declined to comment on the controversy.
When prices decline, they fall.
- Prices of imported goods have declined over the years.
- After the advent of smart phones, wrist-watches have declined in popularity.
Decline can also mean slope down.
- The road declines sharply at this point.
Decline can mean weaken or worsen.
- Her health has declined over the years.
- The rupee has declined against the dollar.
- His popularity declined after the scandal.
As a noun decline means drop.
- The sharp decline in demand has affected the profits of the company.
- We are studying the decline of ancient Rome.
- With his life in decline, he waited for death.
Synonyms of decline: refuse, reject, spurn, turn down, balk at, fail to accept
Antonyms of decline: accept, consent, rise, improve, increase