The broad places - The open spaces next the gates, and other places of concourse.
A man - Or, anyone.
That executeth - “That” practiceth.
Truth - uprightness, probity (so in Jeremiah 5:3).
Related Commentaries of Jeremiah 5:1
Jeremiah 5:1
1 Run ye to and fro through the streets of Jerusalem, and see now, and know, and seek in the broad places thereof, if ye can find a man, if there be any that executeth judgment, that seeketh the truth; and I will pardon it.