adjective
always used before a noun
occupying the number three position in a series
next to the second in importance or rank
equal in size, value, amount, etc., to one third of something
used to refer to the third forward gear or speed of a vehicle
the third time is the charm
US or Brit third time lucky - used to say that two efforts at something have already failed but perhaps the third will be successful;
noun
plural thirds
[singular] :something that is third :the third thing in a series
[count] :one of three equal parts of something
[noncount] :the third forward gear or speed of a vehicle
[noncount] baseball :third base
[count] Brit :an undergraduate degree of the lowest level from a British university