This is the 374th most frequent Croatian word.
cijele
"Whole" or "entire" (feminine plural or singular in certain contexts).
Here, "cijele" is used as an adjective modifying "novine" (newspaper), indicating the entirety of it.
Pročitao sam cijele novine jutros.
I read the entire newspaper this morning.
In this sentence, "cijele" modifies "noći" (night), describing the completeness of the time period.
Cijele noći sam razmišljao o problemu.
I thought about the problem the whole night.
In this sentence, "cijele" is used as an adjective for "obitelji" (families), describing them as whole units.