(~s)
1.
Topside is a joint of beef that is cut from the upper part of the cow’s leg. It is usually cooked by roasting or stewing. (BRIT; in AM, use top round )
N-UNCOUNT
2.
On a ship, if you go ~, you go up onto the top deck. (TECHNICAL)
He left the control station and went ~.
ADV: ADV after v
3.
The ~ or ~s of a ship or boat are the top deck or the parts which you can see above the water. (TECHNICAL)
N-COUNT: usu pl