: involving a secret plan by two or more people to do something that is harmful or illegal : of or relating to a conspiracy. : suggesting that something secret is being shared. See the full definition for conspiratorial in the English Language Learners Dictionary.

What does conspiratorial tone mean?

From Longman Dictionary of Contemporary Englishcon‧spi‧ra‧to‧ri‧al /kənˌspɪrəˈtɔːriəl/ adjective 1 a conspiratorial expression, voice, or manner suggests you are sharing a secret with someone His voice became low and conspiratorial. Pat whispered to Maggie in a conspiratorial tone.

What is the origin of the word conspiratorial?

The adjective comes from its related verb, conspire, "plot," or "make secret plans," from the Latin root conspirare, "to agree, unite, or plot," or literally, "to breathe together." Definitions of conspiratorial. adjective. relating to or characteristic of conspiracy or conspirators.