vt. & vi.压紧，（使）坚实 press sth firmly together

　～ snow　把雪压实
　～ the soil　把土地压实
　～ out　把…扎紧
　～ into　把…压实

　Thousands of crates compacted in a warehouse.　数以千计的板条箱堆放在仓库里。
　Heat and lack of rain have compacted the soil.　高热少雨使土壤板结。
　The compacted snow on the pavement turned into ice.　人行道上被踩实的雪已变成了冰。
　The compacted mass of snow was on the yard.　院子里有团压得很结实的雪团。

 ♣ compact into　(v.+prep.)
　把…压实　press sth firmly together into sth
　The old snow has compacted into the hardness of ice.　雪堆积久了变得像冰那样坚实。
　This article was compacted into a passage.　这篇文章被压缩成一段。
　Try to compact the sand into the mold.　设法把这沙土堆积到模子里。
 ♣ compact out of　(v.+adv.+prep.)
　把…扎紧　fix firmly
　The saleslady compacted a neat package out of my wife's purchase.　那位女售货员把我妻子买的东西整整齐齐地扎成一包。

 ♣ compact, concentrate, consolidate, unify
　这组词都含有“结集一起”的意思。其区别是：compact表示“压紧，束紧”，通常指将许多东西压在一起，形成一个结实的整体；consolidate通常指联合或融合在一起，从而得以“巩固”“加强”; unify表示“统一”，强调由部分构成的统一体，但是各部门仍行使自己的职责，既为自己也为整体的利益服务；concentrate表示“浓缩”“聚拢”，指将许多散开的东西聚集在一个中心的周围。

　装填紧密的，整齐填满的　closely packed together; neatly fitted in a small space

　compact　的基本意思是“装填紧密的，整齐填满的”，可指在小范围内紧凑的，也可指排列整齐有效，引申可表示“小巧的，袖珍的”。有时还可指文体“简洁的，紧凑的”，在句中用作定语或表语。

　It was a compact package.　这是个捆得很紧的包裹。
　The primitive hut was made of compact mud and branches.　原始的茅舍是由坚硬的泥土和树枝建成的。
　News reporters must learn to write compact sentences.　新闻记者必须学会写紧凑的句子。
　The apartment has a compact but well-equipped kitchen.　这间套房有一个虽小巧但设备完善的厨房。
　I bought a compact dictionary last month.　我上月买了一本袖珍字典。
　Stamp the soil down so that it's compact.　把泥土踩结实。
　The computer looks compact and functional.　这部电脑看上去很小巧，并且很实用。
　The long poem is compact of three sections.　这首长诗由三部分组成。

C 协议，条约，契约agreement or contract between two or more parties

　They made a compact to buy a new aircraft.　他们签订了一项购买一架飞机的合同。

　［同义词］ v. compress, press adj. dense, pressed, small, tidy
　［反义词］ v. loosen adj. big, dispersed, loose