1. To count or compute: reckon the cost. See synonyms at calculate. 2. To consider as being; regard as. See synonyms at consider. 3.Informal To think or assume.
INTRANSITIVE VERB:
1. To make a calculation; figure. 2. To rely with confident expectancy. See synonyms at rely. 3.Informal To think or assume.
PHRASAL VERBS:
reckon with To take into account or deal with: a man to be reckoned with.reckon without To fail to consider or deal with; ignore.
ETYMOLOGY:
Middle English reknen, from Old English gerecenian, to recount, arrange. See reg- in Appendix I.