Simply stated definitions...and sites for further research if so desired:
The study of numbers,study of the date and year of one's birth to determine their influence on one's future life.
nandankanan.tripod.com/scienceterms.htm
An ancient science that offers insight into the personality by assigning numeric values to names and birth dates, calculating numerological values and then interpreting the results.
www.findyourfate.com/faq/n-glossary.htm
The system of magick and divination developed by Pythagoras. In numerology, all words, names and numbers may be reduced to single digits which correspond to certain occult characteristics that influence one’s life. ...
www.divinitydice.com/dictionary.htm
is the numerical interpretation of numbers, dates, and the number value of letters.
www.angelfire.com/tx/afaceinacrowd/glossdiv.html
Number symbolism, especially the idea that certain numbers have sacred meanings. Classical Hebrew writers, following the lead of other Mesopotamian cultures, often embody certain numbers with sacred meanings--such as three, seven, twelve, forty, etc. ...
web.cn.edu/kwheeler/lit_terms_N.html
Numerology is the study of the mysterious and hidden meaning of numbers and their relevance to our society and existence, Numerology grew as a branch of mathematics a more concrete and operational system of numbers. ...
www.numerology-guide.com/numerology-glossary/mno.htm
The belief (held by many Chinese people) in the power of numbers and the relationships between them. Hierarchal placement is important within families, business associates, and Triad gangs, as each has their own system with people becoming more important within the organization as their numbers ...
www.hkfilm.net/terms3.htm
The science of numbers based upon qualitative values given to letters of the alphabet which are interpreted in shaping one’s destiny as well as offering guidance in daily living.
cyndi25.com/informative-articles/psychic-words-and-definitions/
the study of the supposed occult influence of numbers on human affairs
wordnet.princeton.edu/perl/webwn
Numerology refers to any of many systems, traditions or beliefs in a mystical or esoteric relationship between numbers and physical objects or living things.