Forewing: The front pair of wings of an insect, which are attached to the mesothorax, the same thoracic segment that bears the middle pair of legs. In mayflies, these are the main, large wings. In caddisflies, they are the outer wings when the wings lay at rest over the body. In stoneflies, they are the top wings when the wings are laid flat over the body. In midges and other true flies, the forewings are the only true wings.
These other words reference the same concept: fore wing, forewings, fore wings.