Meditation is not exclusive to any one particular culture or religious/spiritual group. Generally speaking, meditation induces a sense of relaxation leading one to become receptive to enlightenment.
Proper uses of essential oils during meditation can enhance the experience by grounding you and promoting a sense of calm. Essential oils like Vetiver, Sandalwood, Atlas Cedarwood, Palo Santo and Patchouli are grounding. Other oils like Clary Sage, Lavender and Roman Chamomile act as natural sedatives and can enhance the relaxed state of meditation. Oils like Helichrysum and Frankincense are said to enhance enlightenment and a spiritual connection with the divine.
Aromatic herbs and oils, including essential oils, have been an integral part of the spiritual practices of many religions and cultures throughout history. Here is a list of more essential oils known for their particular value within spiritual applications. Please note that this is not intended to be a complete list. If a particular essential oil personally speaks out to you, by all means, consider incorporating it within your own spiritual practices after you have learned about the oil and understand any warnings or contraindications associated with the oil.
When meditating, I personally prefer using a candle diffuser to diffuse my selected meditation essential oil blend, but other types of diffusers or even a room mist can be used. Look here for information on other types of diffusers.
You can use the below diffuser blends as starting ideas for creating your own personal meditation blends. Be sure to understand the safety and contraindications for each oil that you use that you understand how to properly use your diffuser.