1) Adjust the line of sight of 2) Alter 3) Change 4) Make parallel 5) Modify 6) Parallel 7) To bring into line 1) Align 
• (v. t.) To render parallel to a certain line or direction; to bring into the same line, as the axes of telescopes, etc.; to render parallel, as rays of light.
Col'li·mate transitive verb [ imperfect & past participle Collimated ; past participle & verbal noun Collimating .] [ See Collimation .] (Physics & Astron.) To render parallel to a certain line or direction; to bring into t...
[v] - adjust the line of sight of (an optical instrument)
collimate 1. To make parallel; line up. 2. To adjust the line of sight of (an optical device).
verb adjust the line of sight of (an optical instrument)
to bring into line; make parallel. · to adjust accurately the line of sight of (a telescope).