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.

most recent common —

(chiefly UK, Australia, Ireland, New Zealand, sometimes Canada, rare in the US) A small, flat, baked good which is either hard and crisp or else soft but firm; a cookie.

Third-person singular simple present indicative form of batten down the hatches