Hike up Definition 1 of 2Pro Tip 1/3Physical Action Used when someone physically moves something higher on their body. After stepping into the puddle, she had to hike up her pants to keep them dry. Pro Tip 2/3Informal Context Commonly used in casual conversation, not in formal situations. When we go for a hike, I usually hike up my socks to avoid blisters. Pro Tip 3/3Temporary Adjustment Suggests a temporary action, not a permanent fix. The water level was rising, so I hiked up my dress and waded through.