Definitions

1. adverb

on foot; traveling by walking

“The hikers set out afoot to explore the wilderness.”

2. noun

a matter or situation that is being dealt with or discussed; a topic

“The issue of climate change has been afoot in international politics for years.”

3. verb

to make (something) known or to bring (something) to public attention

“The scandal was afoot in the media within hours of the news breaking.”