1. examine something carefully or explain something again
go over what needs to be done, go through the files
Go over is a phrasal verb with a number of uses and meanings. To go over something can mean to examine or check something. For example. to go over your notes or to go over the details. Go over can also mean to change your connection to a particular political group or religion. For example, She went over to the Green party after the reshuffling. To go over can also mean to move towards someone or something. If you say something went over well it means it produced a good reaction, so you can ask how something 'went over' to ask about how something was received or accepted by others. In a colloquial context to go over something can mean to clean it quickly.
‘Go through’ is a phrasal verb. To go through can mean to experience a difficult or unpleasant situation. For example, you can go through a difficult time in your life or go through a divorce, for example. To go through can also mean to search through something or to look through something, usually to find something or to discover information. You can go through documents or go through accounts. If something goes through it can mean to be officially approved or submitted. For example, a sale can go through or an application can go through. To go through can also mean to use up a resource, so you can go through a lot of money on your holidays, or go through the groceries you bought last week.