Definition of "keep step" []

• Maintain the same pace (verb)

WordNet. Princeton University. 2010.

• "He pictured Marjorie Jones and Maurice, graceful and light-hearted, flitting by him fairylike, loosing silvery laughter upon him as he engaged in the struggle to keep step with a partner about four years and two feet his junior."
• "There may be some of my readers who were present on that occasion, and who may remember the spectacle presented by the little fellow, vainly endeavoring to keep step with the giant strides of these huge grenadiers, the tallest men in the German army, during the march-past that followed the ceremony."