thirdly

UK: /ˈθɜː^rdli/

WordReference Random House Learner's Dictionary of American English © 2025

third /θɜrd/   adj. 

1. next after the second;
   being the ordinal number for three.
2. being one of three equal parts.
3. Automotive of or relating to the gear transmission ratio at which the drive shaft speed is next greater than that of second gear.
4. graded or ranked one level below the second:
   third mate.

n. 

5. a third part, esp. of one (1&sfracdenom;3&sfracend;):
   [countable] Cut it into thirds.
6. [countable] the third member of a series.
7. Automotive third gear:
   [uncountable] Put it (= the car, etc.) in third.
8. [countable] a person or thing next after second in rank.

adv. 

9. in the third place;
   thirdly.

WordReference Random House Unabridged Dictionary of American English © 2025

third (thûrd),  adj. 

1. next after the second;
   being the ordinal number for three.
2. being one of three equal parts.
3. Automotive of, pertaining to, or operating at the gear transmission ratio at which the drive shaft speed is greater than that of second gear for a given engine crankshaft speed, but not as great as that of fourth gear, if such exists:
   third gear.
4. rated, graded, or ranked one level below the second:
   He's third engineer on the ship.

n. 

5. a third part, esp. of one (¹⁄₃).
6. the third member of a series.
7. Automotive third gear:
   Don't try to start a car when it's in third.
8. a person or thing next after second in rank, precedence, order:
   The writer of the best essay will receive a gold medal, the second a silver, and the third a bronze.
9. Law Usually, thirds. 
   • the third part of the personal property of a deceased husband, which in certain circumstances goes absolutely to the widow.
   • a widow's dower.
10. Music and Dance
    • a tone on the third degree from a given tone (counted as the first).
    • the interval between such tones.
    • the harmonic combination of such tones.
11. Sport [Baseball.] See third base. 
12. Business Usually, thirds. [Com.] a product or goods below second quality. Cf. first (def. 19), second ¹ (def. 23).

adv. 

13. in the third place;
    thirdly.

• bef. 900; Middle English thirde, Old English (north) thirda, variant of thridda; cognate with Dutch derde, German dritte, Old Norse thrithi, Gothic thridja, Greek trítos, Latin tertius, Sanskrit tṛtīya. See three

third′ly, adv.