simple past tense and past participle of reckon with

Able to be reckoned or computed.

Too powerful or important to be ignored.

Third-person singular simple present indicative form of reckon upon

Third-person singular simple present indicative form of reckon without

Third-person singular simple present indicative form of reckon up

Third-person singular simple present indicative form of reckon out

A method of estimating the position of a ship or aircraft by applying estimates of the distance and direction travelled to a previously known position. In respect to ships/boats, it excludes the effect of wind and current on the vessel. Compare with estimated position. Abbreviation: DR

(idiomatic, uncommon, archaic) A (falsified) bill that is not itemised, and that is unjustifiably high. / (nautical) A false or incorrect reckoning of position.

Used other than figuratively or idiomatically: see reckon, without. / To ignore; to fail to consider.