"I will be back around 7pm."
Let's break it down:
* ors: This word is not standard French and likely a typo. It is probably meant to be "vers," which means "around" or "towards."
* je serais: This is the future conditional tense of "être" (to be) in the first person singular, meaning "I would be."
* de retour: This means "back."
* vers 19h: This means "around 7pm."
Therefore, the full meaning is "I will be back around 7pm."