Sing we joyous, all together, heedless of the wind and weather.
An example of heedless is someone who walks into traffic without looking both directions.
This was a heedless piece of chivalry on Edward's part.
But that man, so heedless of his words, did not once during the whole time of his activity utter one word inconsistent with the single aim toward which he moved throughout the whole war.
But such Cassandras prophesied to heedless ears.
But the world goes on in its life, heedless of the demands of virtue.
To injure Spain and heedless of England's need, Paul IV.