
bezogen
covered
Provided with a cover. Usually used for beds (with bed linen) or upholstered furniture (with fabric).
Das Bett ist frisch bezogen, du kannst dich hinlegen.
The bed is freshly covered; you can lie down.
covered / related
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covered
Provided with a cover. Usually used for beds (with bed linen) or upholstered furniture (with fabric).
Das Bett ist frisch bezogen, du kannst dich hinlegen.
The bed is freshly covered; you can lie down.

related to
Standing in a direct connection with something; referring to a specific thing or person.
Alle Fragen in der Prüfung waren auf den Stoff der letzten Vorlesung bezogen.
All the questions in the exam were related to the material from the last lecture.

overcast
Describes a sky that is completely covered with clouds so that the sun cannot be seen; covered, cloudy.
Gestern war der Himmel den ganzen Tag bezogen und es sah nach Regen aus.
Yesterday the sky was overcast all day, and it looked like rain.
'Bezogen' (covered/related) is the past participle of the verb 'beziehen' (to cover / to refer to / to obtain). All meanings of the adjective derive from the different meanings of this verb, e.g. 'ein Bett beziehen' (to make a bed / put fresh linens on a bed) or 'sich auf etwas beziehen' (to refer to something).
Ich habe deine Frage auf den letzten Punkt bezogen.
I related your question to the last point.
You can easily recognize the meaning from the subject or the preposition. If 'bezogen' (overcast) appears with 'Himmel' (sky), it means cloudy. If it appears with 'Bett' (bed), it means provided with bed linen. If the preposition 'auf' (to/on) follows, it means 'referring to'.
Der Himmel war heute Morgen komplett bezogen.
The sky was completely overcast this morning.
In the meaning 'referring to something', 'bezogen' (related) is always used with the preposition 'auf' and the accusative. The structure is: 'auf etwas/jemanden bezogen sein' (to be related to something/someone).
Die Übung ist auf das erste Kapitel im Buch bezogen.
The exercise is related to the first chapter in the book.
In the meaning 'provided with a cover', 'bezogen' (covered) is used almost exclusively for 'das Bett' (bed) or for upholstered furniture such as 'das Sofa' (sofa) or 'der Sessel' (armchair).
Die Stühle im Esszimmer sind alle neu bezogen.
The chairs in the dining room have all been newly covered.