Final answer:
The English term for a 'Minor weakness; trivial offense' can be 'peccadillo', which signifies a small, minor fault or offense that is not particularly serious.
Step-by-step explanation:
The term we are looking to define is one whose meaning is a 'Minor weakness; trivial offense.' In English, there are many words that can describe small faults or minor wrongdoings. We can use sentences to provide context and a better understanding of such terms. For example, the sentence 'His penchant for being tardy was a peccadillo, rather than a serious misconduct in the grand scheme of things' uses the word 'peccadillo' to describe a small, relatively unimportant offense or weakness. The key here is to recognize that the term does not refer to a serious flaw or crime, but something much less significant.