Which among the following is not a type of meaning in a poem as defined by I.A. Richards in Practical Criticism?

The correct option is Form.

In his seminal work Practical Criticism (1929), the influential literary critic I.A. Richards proposed that there are four distinct types of meaning (or functions) in a poem or piece of language. These four types are:
1. Sense: What is said; the literal state of affairs that the words point to.
2. Feeling: The speaker's attitude or emotional bias towards the subject or state of affairs they are talking about.
3. Tone: The speaker's attitude towards the listener or audience; how the speaker addresses the reader.
4. Intention: The speaker's purpose, aim, or the effect they endeavor to promote.

Among the given choices, Form is not one of the four types of meaning identified by I.A. Richards in his classification. Therefore, Form is the correct answer.