Learn how to say Dragonfly correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word dragonfly:
noun (plural dragonflies)
a fast-flying long-bodied predatory insect with two pairs of large transparent wings which are spread out sideways at rest. The voracious aquatic larvae take up to five years to reach adulthood. Compare with damselfly.
Suborder Anisoptera, order Odonata: several families