Namaste, the prayer hands gesture over your heart, moving hands to the forehead and then bowing deep is a sign of respect given to my students and to the lineage of teachers that have gone before me. There is a Divine nature in all of us located in the heart (chakra). Namaste recognizes that nature or soul within all of us, by saying "I honor the Spirit or Light within you". Literally in Sanskrit, Namaste translates to "I bow to you". Used as a parting greeting, I've also heard it said to mean "wish you well".
“There is place inside of every human being…a place of love, light, peace, and warmth. When you are in that place and when I am in that place, there is only one of us.” Gandhi
When I lived in Malaysia, I observed that Malaysian Indians would make this gesture without saying Namaste but rather a simple gesture of their hand over their heart saying