Step 1: Understanding the Question:
The question asks for the correct legal meaning of the term "adverse possession."
We need to evaluate how possession transforms into legal ownership over a specified duration under certain legal conditions.
Step 2: Detailed Explanation:
• Adverse possession requires that the possession of the property must be continuous, uninterrupted, open, notorious, and hostile to the true owner.
• Under the Limitation Act, 1963, the statutory period prescribed for claiming adverse possession over private land is \( 12 \) years.
• For government-owned land, the prescribed statutory period is \( 30 \) years.
• If the true owner fails to take legal action to evict the trespasser or possessor within this statutory period, their right to the property is extinguished.
• Consequently, the adverse possessor acquires absolute legal title and ownership over the property.
• This transformation is conditional upon the possession being "nec vi, nec clam, nec precario," meaning without force, without secrecy, and without permission.
• Option (A) accurately captures this rule, noting that it requires certain conditions and a statutory period prescribed by law.
• Options (B), (C), and (D) do not reflect the correct legal definition of adverse possession.
Step 3: Final Answer:
Legally, adverse possession means a person acquires legal ownership of property under certain conditions for a statutory period prescribed by law, which is Option (A).