Noun, almost always plural. The white, foamy tops of waves out on the water — the frothy crest you see when the wind is strong enough to break the top of a wave over. So whitecaps are a sign to read: calm water has none; when whitecaps appear, the wind has picked up, and sailors, swimmers and small-boat fishermen take that as a warning.

Noun, almost always plural名詞，幾乎總是用複數。 The white, foamy tops of waves out on the water海面上波浪頂端白色、帶泡沫的部分—— the frothy crest you see when the wind is strong enough to break the top of a wave over就是風強到把浪頭打散時你看到的那種泡沫浪尖。 So whitecaps are a sign to read所以whitecaps是一個要讀懂的訊號： calm water has none平靜的水面上沒有它； when whitecaps appear, the wind has picked up一旦whitecaps出現，就表示風變強了， and sailors, swimmers and small-boat fishermen take that as a warning水手、游泳的人和開小船的漁夫都會把這個當成一種警告。

The usual patterns are "there were whitecaps on the lake" and "the sea was covered in whitecaps". You can also use it as an adjective-ish description: "whitecapped waves". The singular whitecap exists but sounds odd on its own — the whole point is that there are many of them scattered across the surface.

The usual patterns are "there were whitecaps on the lake" and "the sea was covered in whitecaps"常見的句型是『there were whitecaps on the lake（湖上有whitecaps）』和『the sea was covered in whitecaps（海面上滿是whitecaps）』。 You can also use it as an adjective-ish description你也可以把它用得像形容詞一樣： "whitecapped waves"『whitecapped waves（帶著白色浪尖的浪）』。 The singular whitecap exists but sounds odd on its own單數whitecap是存在的，但單獨用起來聽起來有點怪—— the whole point is that there are many of them scattered across the surface重點本來就是它們一大片散布在水面上。

The dictionary sends you to 'white horses' because that is the British word for exactly the same thing — British speakers see galloping white horses in the foam, American speakers see white caps (hats). Whitecaps is the American and international word and is by far the more common of the two now; white horses sounds a little old-fashioned and poetic. Both are everyday words, not technical ones — a weather forecaster or a sailing instructor will say them without explanation.

The dictionary sends you to 'white horses'字典會叫你去看『white horses』， because that is the British word for exactly the same thing因為那是英式英語裡指同一件事的說法—— British speakers see galloping white horses in the foam英式的人在浪花裡看到的是奔騰的白馬， American speakers see white caps (hats)美式的人看到的是white caps（白色帽子）。 Whitecaps is the American and international wordWhitecaps是美式、也是國際通用的說法 and is by far the more common of the two now現在遠比另一個常見； white horses sounds a little old-fashioned and poeticwhite horses聽起來比較老派、比較詩意一點。 Both are everyday words, not technical ones兩個都是日常用字，不是專業術語—— a weather forecaster or a sailing instructor will say them without explanation氣象播報員或帆船教練會直接用，不需要解釋。