"website is unavailable" is grammatically correct and can be used in written English.
It is commonly used to inform someone that a website or webpage cannot be accessed or used. Example: "I tried to access their website, but it seems to be down. The webpage says 'website is unavailable'."
A spokeswoman said: "We can confirm that our website was unavailable for a few minutes this morning.
The Central Intelligence Agency website was unavailable for a few minutes on Wednesday evening as the group announced the attack via Twitter: "Tango down – cia.gov – for the lulz".
At least one Labor MP has called on the minister responsible for the census to resign after the website was unavailable on Tuesday evening due to a denial of service attack.
Its vision seems to be of a computer screen with a message that the website you seek is unavailable; or perhaps of a mysterious encounter at immigration, and the interpolation of "other business" between check-in and flight.
The Bahamas registry website is often unavailable and the information it contains is patchy.
The Honi Soit website is currently unavailable, but a post on the magazine's Facebook page said: "We are tired of society giving us a myriad of things to feel about our own bodies.
The message on the homepage of his official website said: "Because of this situation, Robin's website is temporarily unavailable.
Of course Gmail being down is not good news for Google's business (directly nor indirectly), but if you're a giant computer manufacturer directly retailing products online across the globe, I'd wager you're a bit worse off when your website is completely unavailable.
CCFOA's website appears to have been taken offline already, while CFA's website claims to be "in maintenance mode," and CSS's website is "temporarily unavailable".
