"fairly elderly" is correct and usable in written English.
You can use it to describe someone who is not particularly old, but is no longer young. For example, "The man walking down the street was fairly elderly."
If they have truly found the Higgs before CERN did, and have done so using a piece of fairly elderly kit, you may expect a few sardonic smiles on the lips of whomever it is from Fermilab that gets nominated to pick up the inevitable Nobel prize alongside Peter Higgs himself.
She drives fairly elderly Land Rovers round her estates and has no taste whatsoever for holidays in the swanky parts of the Med.
"Our membership is fairly elderly, and we've had some complaints when we have the Erdody Quartet, which plays the newest of the new.
The cohort was fairly elderly, and a high proportion of the population had at least one comorbid disease.
The difficulty might also be explained by the complex clinical profile of CKD patients, who tend to be fairly elderly and present cardiovascular comorbidities as well as well-known resistance factors to ESA treatment.
In the story, Gallant does a kind of magic trick, introducing us to a fairly unpleasant elderly Parisienne: xenophobic, passive-aggressive, self-involved, sly — let's say a considerable range of unattractive personality traits.
Compared to previous research, the samples used in the present study include not only the middle-aged group between 45 to 59 years old but also a fairly number of elderly people over 60 so that we could evaluate the impact of SES on health at different age periods.
As most MSK conditions remain fairly common in the elderly populations and as the number of elderly people increases in the future, the socioeconomic burden of MSK in the elderly population will also increase.
Contrary to our expectations based on the existing literature review, the results show that, despite the rapid revitalization processes, the elderly are fairly satisfied with their residential environment in both neighbourhood types.
"You only have to look to see that sport is run by a fairly homogenous group of elderly men.
We found it to be fairly common among the elderly, with a gender difference favouring males and dominated by CAF.
