(UK, historical) A customs inspector at a seaport who oversees the landing of goods from merchant vessels in order to secure payment of duties.

A lock situated between an enclosed basin or a canal and the tide water of a harbor or river, when they are on different levels, so that craft can pass either way at all times of the tide

A mill operated by tidal currents. / A mill for clearing lands of tide water.

A table giving the time of when the tide will be high or low at a particular place.

The tide which occurs when the moon is new or full; the effects of the Sun and moon being reinforced so that this tide is of maximum range.

The tide which occurs just after the first and third quarters of the moon, when there is least difference between high tide and low tide.

The tide at its lowest level for a particular tidal cycle at a certain place. / The time of day when the sea has receded to its lowest level.

The natural tide at its highest level for a particular tidal cycle at a certain place. / The time of day when the sea has risen to its highest level. / (figuratively) climax, culminating point or phase

The period between high tide and the next low tide in which the sea is receding.

The period between low tide and the next high tide in which the sea is rising. / (by extension) The highest point of something; a climax.