as to

preposition

1

: as for, about

at a loss as to how to explain the error

2

: according to, by

graded as to size and color

Synonyms of as to

• regarding
• toward
• as far as
• concerning
• about
• on
• as for
• as regards
• of

Examples of as to in a Sentence

I'm in a quandary as to how to deal with the problem.

Recent Examples on the Web

Details are now emerging as to how the rescue operation took place. —Billy Stockwell, CNN Money, 5 Apr. 2026

Priscilla Wald, who teaches about science fiction at Duke University, has a theory as to why. —ABC News, 4 Apr. 2026

Follow directions on individual packets as to which seeds require bottom heat, light, or darkness to germinate. —Tim Johnson, Chicago Tribune, 4 Apr. 2026

British men Hamza Iqbal, 20, and Rehan Khan, 19, and a 17-year-old of dual British-Pakistani nationality, all from east London, were charged Friday with arson and being reckless as to whether life would be endangered. —CBS News, 4 Apr. 2026

Word History

First Known Use

14th century, in the meaning defined at sense 1

Rhymes for as to

• accrue
• ado
• ainu
• aircrew
• airscrew
• anew
• askew
• baboo
• babu
• bamboo
• beaucoup
• bijou

Kids Definition

as to

preposition

1

: with respect to : about

confused as to what happened

2

: according to sense 1

graded as to size