think over
To consider or ponder something; to reflect upon something. A noun or pronoun can be used between "think" and "over." Think it over, and let me know in the morning if you want the job. I spent the next few days thinking over everything she'd said to me just before she died.
think something over
to think about something and whether one will choose to do it. I need a few minutes to think it over. Let me think over your request for a day or so.
think over
Ponder, reflect about, especially with a view to making a decision. For example, I'll have to think it over carefully before I can say yes or no. [Mid-1800s]
think over
v. To consider or reflect on something, especially in order to make a decision: The students thought over the story they had just read. Here's my proposal—think it over, and let me know how you feel.