1. Literally, to pierce, pass, or enter into or through something. The howling wind cracks through the walls at night. Rebel forces have cracked through the military's barricade and have now overrun the parliament building.

2. Figuratively, to surmount some difficulty or restriction so as to enter into some place or situation. After four years in the law firm, Meredith finally cracked through the glass ceiling and was made a partner.