Which dictionary meaning of the word ‘mind’ does the Gita refer to?

From Prof Phadnavis:

The Oxford Dictionary gives the following meanings of the mind:

mind |mʌɪnd|

noun

1 the element of a person that enables them to be aware of the world and their experiences, to think, and to feel; the faculty of consciousness and thought: a lot of thoughts ran through my mind.

2 a person’s ability to think and reason; the intellect: his keen mind.

• a person’s memory: the company’s name slips my mind.
• a particular way of thinking, influenced by a person’s profession or environment: he had a deep contempt for the bureaucratic mind.
• a person identified with their intellectual faculties: he was one of the greatest minds of his time.

3 a person’s attention: employees should keep their minds on the job.

• a person’s will or determination to achieve something: anyone can slim if they set their mind to it.

Which of these meanings does the Gita refer to when it says that the mind can be our enemy or friend?