What is thru meaning?

As an AI language model, I can provide information about the word 'thru' which is a variant spelling of 'through'. 'Thru' is often used in casual or informal contexts, and it is commonly used in signage, advertising, and marketing materials. It is considered a shortened or simplified version of the standard spelling. However, it is not considered correct English by some users and may be considered incorrect or inappropriate in formal writing or professional communication. Its usage also may vary geographically, as it is more prevalent in American English than in British English.