Definition of "perpendicularly" [per•pen•dic•u•lar•ly]

• In a perpendicular manner. (adverb)

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• "There was no way of penetrating the island from our cove, for the walls rose perpendicularly from the beach, and, on either side of the cove, rose from the deep water."
• "A display popped up, showing the three chosen rocks in a split screen, the dark spikes of the broken missiles sticking out perpendicularly from the surface."
• "And even at Södermalm, where the mountain rises perpendicularly from the strand, they began to build."