probably

In all likelihood.

Adverb

  1. In all likelihood.
    • She probably has arrived by now.
    • She has probably arrived by now.
    • Probably she has arrived by now.

    Synonyms: likely in all probability more than likely belike

    Coordinate Terms: as like as not as likely as not possibly maybe perhaps mayhap mayhaps perchance haply presumably certainly definitely doubtless doubtlessly indubitably

Origin

From Middle English probably, probabily, equivalent to probable + -ly.

Forms

more probably most probably probablely probally probly prolly proly pby