adjective

• Strained; drawn close; tight.
• Tense; not relaxed.
• Exact; accurate; precise; rigorously particular.
• Governed or governing by exact rules; observing exact rules; severe; rigorous.
• Rigidly interpreted; exactly limited; confined; restricted.
• (botany) Upright, or straight and narrow; — said of the shape of the plants or their flower clusters.
• Severe in discipline.
• (set theory, order theory) Irreflexive; if the described object is defined to be reflexive, that condition is overridden and replaced with irreflexive.