Definition of "at will" []

• At one's preference; as one sees fit (phrase)

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• "The broad, deep waters about Manhattan Island afforded easy access to the enemy fleet, which could come and go at will up the Hudson and East Rivers and interpose itself between whatever scattered positions the Americans chose to man."
• "The first experiment was complex, but two results stand out: (1) when alcohol-preferring rats were allowed to drink alcohol at will for a period of three months, the amount of DBI in the cerebellum and hypothalamus rose significantly, and (2) when alcohol-nonpreferring rats were subjected to the same experiment, no such increase was obtained."
• "Anticipating perhaps the research of the present and the potential progress of the future, Tibetan scholar Evans-Wentz wrote, “By applying the yoga of the dream state, of the Bardo and of Transference, mankind would become masters of all states of consciousness, and be able to pass at will from the waking-state to the dream-state, and from the state called life to the state called death, and vice versa.”"