What Is Step Definition In Cucumber?

 A step definition is the actual code implementation of the step mentioned inside scenario in feature file. A step definition is mentioned inside step definition file. This code can be written in any Cucumber supported language like Java, Ruby etc.

Consider a step: When I fill in "textbox" with "xyz"

Step Definition in Java

@When("^I fill in \"([^\"]*)\" with:$")
public void i_fill_in_with(String elementName, String messageText)