| to boot adverb Besides, in addition. For example, It rained every day and it was cold to boot, or He said they'd lower the price of the car by $1,000 and throw in air condition to boot. This expression has nothing to do with footwear. Boot here is an archaic noun meaning "advantage," and in the idiom has been broadened to include anything additional, good or bad. to boot or not to boot to boot, to boot she did say to boot, to boot this very day to boot, to boot she said again to boot, to boot to her friend to boot, to boot the friend's reply to boot, to boot he did cry to boot, to boot is not a shoe to boot, to boot is addition to |