Definitions

1. interjection

an expression of surprise, shock, or excitement

“She let out a loud ‘whoa’ when she saw the surprise party.”

2. verb

to check or control the speed of a horse, typically by pulling on the reins

“The rider had to whoa the horse to avoid running into the obstacle.”

3. noun

an exclamation or cry of surprise or shock

“The whoa of excitement echoed through the stadium.”