Seeing a monkey in a dream might have completely different meanings as per Islam relying upon the context and state of affairs.
1- In keeping with Ibn Sirin رحمة الله عليه the best dream interpreter of Islam, a monkey in a dream represents a crafty and a cursed enemy.
2- Sitting beside an obedient monkey means he shall takeover his enemy and the enemy shall turn into his obedient.
3- Preventing with a monkey in a dream such that he fears it signifies that he would turn into ailing, but would get better.
4- Killing a monkey in a dream means to make the enemy robust and influential.
5- Consuming the meat of a monkey in a dream means sorrow and unhappiness.
6- Receiving a monkey as a present in a dream signifies that somebody would present enmity in direction of the dreamer.
7- In keeping with Jabar Maghrabi رحمة الله عليه seeing a monkey sitting on a horse signifies that a jew would trigger some issues along with his spouse.
8- Seeing a feminine monkey in a dream means a witch who does black magic.
9- If a monkey has entered his home in a dream means his spouse would do black magic.
10- Speaking to a monkey in a dream signifies that his spouse would trigger loss to him.
11- A monkey chew in a dream signifies that the dreamer would turn into sick or his household would abuse him.
12- Receiving a present from a monkey in a dream signifies that the dreamer would waste his wealth.
Disclaimer: The fabric used for the interpretation of goals has been extracted from the Ibn Sirin book for dream interpretations. You may learn the e-book here.