I’ve seen the phrase “No offense taken” in the answers to the comments in EL&U site. None of online Cambridge, Oxford and Merriam-Webster dictionary registers this usage, nor does Google Ngram.
However, I was able to find the definitions of both “No offense taken / meant” as “I am not offended [by what you said] / I did not mean to offend you,” in idioms.thefreedictionary.com and www.urbandictionary.com
Since what time around did these expressions come into currency? Are they a polite way of excusing? Can I use “No offense meant (taken)” in both colloquial conversation and formal meeting, for instance with the client advertiser in opposing their idea?