of sight from outside a stall e g from the outside looking in partition 18 is a u201c no sight u201d partition in that door 20 and pilasters 22 24 close at seams 28 30 such that there is no line of sight through seams 28 30 when door 20 is in the closed position when a user fully closes door 20 and is within interior area 14 no one from outside stall 12 may see into interior portion 14 through seams 28 30 this u201c no sight u201d feature is an advantage over many conventional partitioning systems that leave gaps at the seams thereby potentially compromising the privacy and security of users as shown in fig4 6 door 20 may include a first member or lip 32 e g a rail extension projection etc that according to one embodiment may extend along a portion or all of the length of door 20 lip 32 on door 20 may be configured to engage a corresponding second member or stop 34 e g an extension rail etc provided on pilaster 24 according to one embodiment stop 34 may be formed by two grooves 36 38 see fig5 that are formed into pilaster 24 and may be generally symmetric about a mid section of pilaster 24 as shown in fig4 when door 20 is closed lip 32 overlaps with stop 34 along the length of seam 30 such that it is not possible to see u201c through u201d partition 18 e g in the direction represented with arrow a in fig4 6 between adjoining or adjacent panels or members of the stall furthermore the overlap of lip 32 and stop 34 permit door 20 to be opened in only a single direction for example as shown in.