Namaste \NUHM-uh-stey\ , noun;
1. A conventional Hindu expression on meeting or parting, used by the speaker usually while holding the palms together vertically in front of the bosom
2. A conventional Hindu expression on meeting or parting, frequently a part of yoga practice
According to Etymonline.com:
The word dates to 1948 in English, but in Hindi it is much older. It comes from Sanskrit namas ("bowing") + te (dative of tuam, singular "you"). It has been used as a word of greeting since 1967.
*Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Sunday, November 28