While never extremely common, tho and thru have a long history of occasional use as spelling variants of though and through. Their greatest popularity occurred in the late 19th and early 20th centuries, …

THRU definition: an informal, simplified spelling of through. See examples of thru used in a sentence.

May 25, 2023 · “Thru” is a an alternate spelling of “through” that works in only one situation. Learn more about these tricky words in this guide.

Oct 31, 2025 · Thru is mostly used where the preposition through could be used (e.g. Monday thru Friday); it is less common as an adjective or adverb (I'm thru with the vacuuming).

Dec 20, 2021 · It’s easy to get mixed up on when to use thru vs. through, but this guide can help you. Explore the correct ways to use each word with these examples.

Nov 27, 2025 · The main difference between ‘thru’ and ‘through’ is that ‘through’ is the standard spelling and should be used in formal writing, while ‘thru’ is more appropriate in informal writing and when …

Oct 16, 2025 · Confused between thru or through? Learn the difference, usage rules, and examples to choose the correct spelling every time.

Jan 12, 2026 · Thru is a non-standard spelling of “ through “, therefore it is incorrect in standard American English. You should never use thru in an academic or professional setting.

Through, across, opposite and against across across country idiom against agin along catty-corner country cross front give onto something phrasal verb kitty-corner on opposed opposite other over …

Definition of thru preposition in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.