四海 sìhǎi the whole world Definitions Defs Origin Strokes Stroke Words Sentences Sents sìhǎi the whole world 四 sì numeral four the number four; complex form used for financial purposes is 肆 sì海 hǎi noun sea ocean or sea; large bodies of water including salt lakes or large inland lakessìhǎi generous 四 sì adverbnoun all around (in combination) used with two related terms to indicate various or all around, as in the expression sì xiāng bā zhèn meaning 'all the towns and villages'海 hǎi excessively (colloquial) without restraint; aimlessly or excessivelysìhǎi four seas 四 sì numeral four the number four; complex form used for financial purposes is 肆 sì海 hǎi noun field a particular field of activity or a realm