Indian style of greeting and their elaborate meaning:

Both 'Namaskar' and 'Namastae' are used interchangeably by people to greet the other person meeting you. It is done by softly joining both the palms of the hands against each other keeping the two thumbs close to the chest at the middle of the body.
Both words are derived from the Sanskrit word 'Namah' = Salute or bow and 'te'= you.
It would be interesting to elaborate on that: This posture conveys that: "with all the wisdom in my head, with all the humility ,affection and love in my heart, and with all the strength in my hands; I bow before you". Bowing here signifies absence of ego...at least for that very moment.
In fact it is being addressed to the holy light of thee; in each of us and not to the person per se and thus salutes to one supreme power in all of us.
Another is pronouncing "Pranam", while observing the same posture as above and it also means I salute to the supreme lord dwelling in you... and at times the eyes get closed out of involvement and respect to the other person as in meditation...