40th
- adjective
- /ˈfɔrtiˌθ/
- Today is the 40th wedding anniversary of my mom and dad, the Becketts.
- 40th anniversary
- 40th birthday
- 40th year
Examples
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Your daughter bought you this last year for your 40th birthday.
Academic text (2009) -
In fact, we're celebrating our 40th year this year.
Academic text (2016) -
Now driving in the 40th and final position...
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You know, this is our 40th year.
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And home in time for our 40th wedding anniversary.
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Pete is just talking to me about his 40th birthday party.
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I LOVE Disney and my wife surprised me for my 40th birthday by taking our family there.
Blog text (3) -
Also, as a celebration of their 40th anniversary, Tribute Blend VIA was introduced in March 2011.
Blog text (20) -
The European Southern Observatory (ESO) celebrates its 40th birthday this year.
Academic text (2002) -
This weekend, we are hosting a big celebration for my 40th birthday.
Synonyms
Coming after thirty-nine others in a list
How Late
Surface Forms
Morphology
40th = 40 (transparent) = 40 + th
Regular ordinal formation from the numeral with the productive English ordinal suffix '-th', which is predictable for learners.
Etymology
40Th comes from the number forty plus the ending -th, a small part that turns a number into its place or order, just like in fifth or tenth. So 40th simply means 'in position forty' or 'the forty in a sequence'.