The phrase "almost fully open" is correct and usable in written English.
It can be used to describe something that is nearly, but not completely, open, such as a door, window, or a situation.
Example: "The window was almost fully open, allowing a gentle breeze to flow into the room."
Alternatives: "nearly wide open" or "mostly open".
Cleared to play by the team doctor, Mike Kelly, and the trainer, Tim Walsh, 45 minutes before tip-off, Kidd took the Charlotte Coliseum court for Game 4 of the Eastern Conference semifinals with a wide bandage covering the 15 stitches above his right eye, which was only slightly swollen and almost fully open.
The maximum recruitment strategy (MRS) guided by thoracic CT scan is capable of reversing alveolar collapse almost completely, allowing PEEP titration to sustain lungs almost fully open, homogenizing tidal ventilation and possibly reducing ventilator-induced lung injury.
In the last 30 years the political establishment, supported by the business community, has selectively opened its borders for people, and almost fully opened borders for trade.
The new law does away with country-specific quotas and makes them worldwide, almost fully opening the gates to Chinese and Indian scientists and engineers.
One of the few urban hermitages in the country, the Franciscan Monastery's retreat has been almost fully booked since it opened last October.
I set an alarm for 8.30am, have my coffee almost before my eyes are fully open, eat my boiled eggs and toast, do Pilates and get to my desk for 10am.
The Beijing Olympics were supposed to be the moment China opened itself almost fully to the foreign media.
Nikolaus Harnoncourt, a founder of the period-instrument movement who once devoted himself almost fully to the Baroque repertory, opens the series with a Beethoven program, with the ebullient Lang Lang as soloist in the First Piano Concerto.
It's designed to run on almost any hardware and includes a fully open and free UI complete with source code.
For a moment — an indelibly exciting one — it was Berlin again, just after the Wall came down, and East Berlin was fully open to the West again after almost three decades.
Since the electronic states around K point are almost fully contributed from the germanene/silicene layers, the gaps that opened for the superlattices are due to the interactions between the germanene/silicene layers only.
