1. Wandering; roving; rambling; deviating from a certain course. A knight errant, one who, in the middle ages, wandered about to seek adventures and display his heroism and generosity.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• urgant,
• wrrant,
• errens,
• ersnt,
• werrnt,
• errend,
• erran,
• errot,
• frront,
• oriant,
• errate,
• earnt,
• eragant,
• arrent,
• arrane,
• erron,
• tyrrant,
• errans,
• wrranty,
• ewant

• eranthis,
• errand,
• erianthus.

The adverb form of "errant" is "errantly".

The adjective form of the word "errant" is "errant" itself.

The plural form of the word "errant" is "errants"

The singular form of the word "errant" is "errant". The word doesn't change in the singular form.