A marching step of 15 inches (38 centimeters) at quick time and 18 inches (46 centimeters) at double time.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "half step" in a sentence
"Perry Werden needed to take only a half step to record the out."
"To ease the strain on our arms and foreheads, we took turns walking one half step ahead of each other so at least one of us could make it to the DFAC, the chow hall, in peace."
"Then he shifted his weight from one foot to the other, stammered something that sounded like, “Er wellah,” and took a half step backward."