Step 1: Understanding the Concept:
The question asks to identify the correct synonym or definition for the vocabulary word "Taciturn".
This word is used to describe a specific personality trait related to communication.
Step 2: Detailed Explanation:
The word "Taciturn" is derived from the Latin word 'taciturnus', which means silent.
A taciturn person is someone who is habitually silent, reserved, or uncommunicative in speech.
Let us evaluate the given options:
(A) Very talkative: This is the exact opposite (antonym) of taciturn.
(B) Reserved or silent: This perfectly matches the definition of the word.
(C) Extremely angry: While a silent person might be angry, "taciturn" describes a communication style, not an emotional state like anger.
(D) Careless in behaviour: This refers to being "reckless" or "negligent", which is unrelated to the amount one speaks.
Step 3: Final Answer:
The correct meaning is Reserved or silent.