คำว่า ' fortieth ' ( ADJ )
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คำนิยามในภาษาอังกฤษ (definition) :
[a.] Following the thirty-ninth, or preceded by thirty-nine units, things, or parts.
[a.] Constituting one of forty equal parts into which anything is divided.
[n.] One of forty equal parts into which one whole is divided; the quotient of a unit divided by forty; one next in order after the thirty-ninth.