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n 1 (infml 口) dive or fall (esp into water) with the head first 头部向下跳水或跌落（尤指入水）: take a header into the swimming-pool 头先入水跳入游泳池. 2 (in football) act of hitting the ball with the head （足球运动中）用头顶球.

head first, head for, Head of State, head off, head on, head start, head towards, head up, head wind, head-dress, head-hunter, head-hunting, head-on, head-rest, head-set, head-shrinker, head-waters, headache, headband, headboard, headgear, heading, headlamp, headland, headless, headlight, headline, headlong, headman, headmaster, headmaster, headmistress, headphones, headquarter, headquarters, headroom, headscarf, headship, headstone, headstrong, headway,