reckoning (Noun) — Problem solving that involves numbers or quantities.
reckoning (Noun) — A bill for an amount due.
reckoning (Noun) — The act of counting; reciting numbers in ascending order. ex. "the reckoning continued for several hours"
reckoning (Verb) — Expect to be true; believe.
reckoning (Verb) — Judge to be probable.
reckoning (Verb) — Perceive or think about in a particular way; deem to be.
reckoning (Verb) — (mathematics) make a mathematical calculation or computation.
reckoning (Verb) — Have faith or confidence in.
reckoning (Verb) — Take account of. ex. "You have to reckon with our opponents"