1tide 
/ˈtaɪd/ noun
plural tides /ˈtaɪd/ noun 1 a [count] : the regular upward and downward movement of the level of the ocean that is caused by the pull of the Sun and the Moon on the Earth
▪ a chart of the tides ▪ Is the tide coming in or going out? = Is the tide rising or falling? — see also ebb tide, flood tide, high tide, low tide, riptide
b [singular] : the flow of the ocean's water as the tide rises or falls
▪ The boat got swept away in/by the tide. 2 [singular] : the way in which something is changing or developing
▪ We tried to gauge the tide of public opinion. [=to find out how public opinion was changing] ▪ the tide of history ▪ The team was on a losing streak, but then the tide turned [=their luck changed] and they went on to win the championship. 3 [singular] : something that increases over time — + of ▪ The government is dealing with a rising/swelling/growing tide of criticism over its foreign policy. ▪ They are concerned about the rising tide of crime [=the increasing amount of crime] in the city. ▪ We have to do something to stem the tide of violence. [=to stop the violence from continuing and increasing]
▪ a chart of the tides ▪ Is the tide coming in or going out? = Is the tide rising or falling? — see also ebb tide, flood tide, high tide, low tide, riptide
b [singular] : the flow of the ocean's water as the tide rises or falls
▪ The boat got swept away in/by the tide.
▪ We tried to gauge the tide of public opinion. [=to find out how public opinion was changing] ▪ the tide of history ▪ The team was on a losing streak, but then the tide turned [=their luck changed] and they went on to win the championship.
go/swim with/against the tide
◊If you go/swim with/against the tide, you think or behave in a way that agrees/disagrees with how most other people think or behave.
▪ Politically, she tends to go against the tide on her college campus. [=she tends to have different political opinions than most people on her college campus]
▪ Politically, she tends to go against the tide on her college campus. [=she tends to have different political opinions than most people on her college campus]
