‘d1. Contraction of had: He’d already left.2. Contraction of would: I’d rather walk than drive.3. Contraction of did: Who’d you ask?American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.’d contraction of would or had: I’d; you’d. Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014D, d (di) n., pl. Ds D’s, ds d’s. 1. the fourth letter of the English alphabet, a consonant. 2. any spoken sound represented by this letter. 3. something shaped like a D. 4. a written or printed representation of the letter D or d. dd- Biochem. Symbol. (of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: printed as a small capital, roman character (disting. from l-). d- Symbol. dextrorotatory; dextro- (disting. from l-). d’ , Pron. Spelling. do (esp. before you): How d’you like them? ‘d 1. contraction of had: They’d already left. 2. contraction of would: I’d like to see it. 3. contraction of did: Where’d you go? 4. contraction of – ed: She OK’d the plan. D 1. deep. 2. depth. 3. diopter. 4. divorced. 5. Dutch. D Symbol. 1. the fourth in order or in a series. 2. (sometimes l.c.) (in some grading systems) a grade or mark indicating poor or barely acceptable quality. 3. a. the second note of the ascending C major scale. b. a tonality having D as the tonic. 4. (sometimes l.c.) the Roman numeral for 500. Compare Roman numerals. 5. deuterium. 6. aspartic acid. D. 1. day. 2. December. 3. Democrat. 4. Democratic. 5. Physics. density. 6. Deus. 7. Deuteronomy. 8. Doctor. 9. dose. 10. Dutch. d. 1. date. 2. daughter. 3. day. 4. deceased. 5. deep. 6. degree. 7. delete. 8. Brit. pence. [