adjective
1. : living or remaining in seclusion and aloof from normal social participation or secular concerns or from public notice or public affairs
he is not a cloistered intellectual — Clifton Daniel
men with burning causes are generally more eloquent than cloistered dons — Heywood Broun
2. : narrowly restricted or insulated in outlook and interests : preoccupied and detached
the phenomenon of a college professor leaving his cloistered life to enter a political fight
the cloistered thinking of certain isolationists
3.
a. : sheltered or providing shelter from contact with common life and relations with the outer world : intent on its own affairs to the exclusion of external affairs
you might have expected such a man to end his days in the cloistered academic world of books and blackboards — Philip Pollack
b. : such as is provided by the isolation of a cloister
to recapture the cloistered serenity in his work which he had grown to love — Marcia Davenport
c. : cultivated or conducted in the privacy of seclusion sheltered from outside interference and the bustle of mundane life
a fugitive and cloistered poetry that never at any time heard the chimes at midnight — J.L.Lowes