interrogative

adj

1. Asking or denoting a question.

   “an interrogative phrase”

   “an interrogative pronoun”

   “The regular place of the interrogative word, of whatever kind, is at the beginning of the sentence, or as near it as possible.”

   “An interrogative particle ke is placed at the end of a question. […] The interrogative words are placed at the beginning of the sentence”

2. Pertaining to inquiry; questioning

   “He took on an interrogative tone of voice.”

   “Thus speaking, the good man regarded his lady with an interrogative look. "I do n't know, dear!" she replied kindly, and sighing again.”

noun

1. A word (pronoun, pronominal adjective, or adverb) implying interrogation, or used for asking a question: why, who, when, etc.

   “When question words are used, it is not necessary to add the ke particle, as it is already embedded in the interrogative”

2. (archaic)Synonym of question mark ⟨?⟩.

   “There be five manner of points and divisions most used among cunning men; the which if they be well used, make the sentence very light and easy to be understood, both to the reader and hearer: and they be these, virgil,—come,—parenthesis,—plain point,—interrogative.”

   “Whoever introduced the several points, it seems that a full-point, a point called come, answering to our colon-point, a point called virgil answering to our comma-point, the parenthesis-points and interrogative-point, were used at the close of the fourteenth, or beginning of the fifteenth century.”

3. (rare)A question; an interrogation.

   “"Who are you, sir, and what is your business?" demanded the Marquis... "That is a fair interrogative, my lord," answered Dalgetty.”