Meaning : To any extent at all.
Example :
Are you in the least interested?.
Synonyms : even a little
Meaning : In the slightest degree or in any respect.
Example :
Are you at all interested? No, not at all.
Was not in the least unfriendly.
Synonyms : at all, the least bit
In the least ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. In the least ka matlab kya hota hai?