topside

UK: /ˈtɒpˌsaɪd/ US: (top′sīd′)

WordReference Random House Unabridged Dictionary of American English © 2026

top•side  (top′sīd′), n. 

1. the upper side.
2. Usually, topsides. [Naut.] the outer surface of a hull above the water.
3. the most authoritative position or level.
4. [Chiefly Brit.] a cut of beef similar to a U.S. rump roast. Cf. silverside (def. 1).
5. [Brit.] the top or outer side of a round of beef;
   beef from the outer thigh of a butchered cow.

adj. 

6. of, pertaining to, or located on the topside.
7. of the most authoritative rank.

adv. 

8. Also, top′sides′. up on the deck:
   He left the engine room and went topside.
9. to, toward, or at the topside.

• top¹ + side¹ 1670–80

Collins Concise English Dictionary © HarperCollins Publishers::

topside / ˈtɒpˌsaɪd/ noun

1. the uppermost side of anything
2. a lean cut of beef from the thigh containing no bone
3. (often plural) the part of a ship's sides above the waterline
4. the parts of a ship above decks