1 marvel, prodigy, phenomenon, spectacle, rarity, sight, curiosity, miracle, Slang knockout, stunner, mind-blower, mind-boggler, trip:
Surely, the wheel must rank high among the wonders of technology. And still he gazed, and still the wonder grew, / That one small head could carry all he knew.
2 awe, astonishment, admiration, amazement, wonderment, surprise, stupefaction, fascination:
Facsimile transmission, which used to excite so much wonder, is now used in offices all over the world.
3 ponder, muse, meditate, think, theorize, conjecture, puzzle, query, question, inquire, be inquisitive, be curious, ask oneself, speculate, cudgel (one's) brains:
I wondered if I would be invited to the dance. Have you ever wondered what makes the world go round?
4 marvel (at), goggle, gawk, gape, stare, be awed, be thunderstruck, be amazed, be astonished:
We wondered at the death-defying skills of the trapeze artistes.
5 wonder about. question or doubt the sanity or reason or reasonableness of:
I wondered about Tammy after that streaking episode.