Emily Dickinson Lexicon

PAS-SANT', a.

1. In heraldry, walking, from Fr. passant, a passenger, traveler.
2. Cursory; careless. – Barrow. On a passant review of what I wrote to the Bishop. – Sir Peter Pett's Preface to Bp. Barlow's Gen. Remains. En passant, [ong passong; Fr.] By the way; slightly; in haste.