誕生日とは人が生まれた日のことだ。
Sentence Analyzer
English Translation
        The birthday is the day on which a person was born.
    
Furigana
Romanji
        Tanjōbi to wa hito ga umareta hi no koto da.
    
Words
            
                誕生日
            
            
                (たんじょうび)
            
        
        
            birthday
        
    
            
                と
            
            
                (と)
            
        
        
            if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                人
            
            
                (ひと、ヒト)
            
        
        
            man; person; human being; mankind; people; human (Homo sapiens); humans as a species; character; personality; man of talent; true man; another person; other people; others; adult
        
    
            
                が
            
            
                (が)
            
        
        
            indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
        
    
            
                生まれる
            
            
                (うまれる)
            
        
        
            to be born
        
    
            
                日
            
            
                (ひ)
            
        
        
            day; days; sun; sunshine; sunlight; case (esp. unfortunate); event
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                事
            
            
                (こと、こん)
            
        
        
            thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
        
    
            
                だ
            
            
                (だ)
            
        
        
            be; is; indicates past or completed action; indicates light imperative
        
    Kanji
Reading: タン
                        Meanings: nativity, be born, declension, lie, be arbitrary
                    Readings: セイ、 ショウ、 い.きる、 い.かす、 い.ける、 う.まれる、 うま.れる、 う.まれ、 うまれ、 う.む、 お.う、 は.える、 は.やす、 き、 なま、 なま-、 な.る、 な.す、 む.す、 -う
                        Meanings: life, genuine, birth
                    Readings: ニチ、 ジツ、 ひ、 -び、 -か
                        Meanings: day, sun, Japan, counter for days
                    Readings: ジン、 ニン、 ひと、 -り、 -と
                        Meaning: person