Guard Lock

Guard Lock

A Guard Lock or Tide Lock is a canal lock located between a canal and a body of water of varying depth such as a harbor or a river. When the canal is at a different level than the open body, such a lock allows ships and boats to pass into and out of the canal regardless of the water level or tide.


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  • Guard lock — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • guard lock — Tide Tide, n. [AS. t[=i]d time; akin to OS. & OFries. t[=i]d, D. tijd, G. zeit, OHG. z[=i]t, Icel. t[=i]?, Sw. & Dan. tid, and probably to Skr. aditi unlimited, endless, where a is a negative prefix. [root]58. Cf. {Tidings}, {Tidy}, {Till}, prep …   The Collaborative International Dictionary of English

  • guard lock — noun 1. : a tide lock at the mouth of a dock or basin or a lock for preventing flooding of a canal 2. : a lock guarding the keyhole or bolt of another lock and having to be unlocked before the key of the main lock can be operated …   Useful english dictionary

  • Guard — Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or attack;… …   The Collaborative International Dictionary of English

  • Guard boat — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • Guard cells — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • Guard chamber — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • Guard detail — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • Guard duty — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

  • Guard of honor — Guard Guard, n. [OF. guarde, F. garde; of German origin; cf. OHG. wart, warto, one who watches, warta a watching, Goth. wardja watchman. See {Guard}, v. t.] [1913 Webster] 1. One who, or that which, guards from injury, danger, exposure, or… …   The Collaborative International Dictionary of English

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