(construction) A standing seam that uses a double overlapping interlock between two metal panels.

plural of double lock standing seam

To lock someone up in prison indefinitely.

one who practices locksmithing / (gambling, slang) someone who only bets when they are sure they will win

The science and art of making and defeating locks.

(military) A step whereby the toe of one man is brought very close to the heel of the man in front. / (figuratively) Close connection, unison, rigid synchronization.

(sewing) A stitch made by a sewing machine in which two threads are interlocked.

(sewing) To use this kind of stitch.

plural of locksmith

plural of lockstitch