Some questions in Chinese
Please explain to me the meaning of the following:

1. 老师

2. 老子

3. 老字

4. 天名

If there are multiple meanings for each of those, please write them

Question

Some questions in Chinese
Please explain to me the meaning of the following:

1. 老师

2. 老子

3. 老字

4. 天名

If there are multiple meanings for each of those, please write them

Answer

老师 = a respectful term to mean teacher.
老子 = old man or Lao Tzu
老字 = old/obsolete/ancient character
天名 = literal meaning heavenly/celestial name.  As a term, no meaning at all without context.

Answer

老子 could either be the great philosopher of Taoism or I/ me/myself ( it's an arrogant or rude way of saying that), but the tone of 子 is different.