1. (姿势、语调)询问的，疑问的
An interrogative gesture or tone of voice shows that you want to know the answer to a question.

2. 疑问句;疑问结构
In grammar, a clause that is in the interrogative, or in the interrogative mood, has its subject following 'do', 'be', 'have', or a modal verb. Examples are 'When did he get back?' and 'Are you all right?'. Clauses of this kind are typically used to ask questions.

3. 疑问词
In grammar, an interrogative is a word such as 'who', 'how', or 'why', which can be used to ask a question.

1. a sentence of inquiry that asks for a reply

e.g. he asked a direct question
he had trouble phrasing his interrogations

Synonym: questioninterrogationinterrogative sentence

2. some linguists consider interrogative sentences to constitute a mood

Synonym: interrogative mood