third

number

• 1constituting number three in a sequence; 3rd:the third century the third of October Edward the Third
• the third finisher or position in a race or competition:Hill finished third
• the third in a sequence of a vehicle’s gears:he took the corner in third
• Baseball third base.
• chiefly British the third form of a school or college.
• thirdly (used to introduce a third point or reason):second, they are lightly regulated; and third, they do business with non-resident clients
• British a place in the third grade in an examination, especially that for a degree.

• 2each of three equal parts into which something is or may be divided:a third of a mile

• 3 Music an interval spanning three consecutive notes in a diatonic scale, e.g. C to E ( major third, equal to two tones) or A to C ( minor third, equal to a tone and a semitone).
• the note which is higher by a third than the tonic of a diatonic scale or root of a chord.