Englishfor English speakers
enhancement
Noun
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An enhancement is an improvement in quality or value.
The original product has undergone many enhancements over the years.
of
Preposition
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Made using.
It is a house of cards.
signal
Noun
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A picture, or a light, or a movement of a hand, or other thing that tells people to do something.
When I make this signal with my hand, everybody walk to the front of the room.
—
A picture, or a light, or a movement of a hand, or something else that lets someone recognize another person, a ship, an airplane or something else.
The sailor saw the signal on the other ship and so recognized it was the enemy.
signal
Verb
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When someone or something signals to someone, they use a signal to tell the person something.
The red light signals to the cars to stop.