НБАРС не дает значения тесный.
OED: (b) fig., in collocation with narrow,
esp. in phr. straight and narrow path, a course of conventionally moral and
law-abiding behaviour; freq. ellipt. in colloq. usage as straight and narrow.
Cf. strait and narrow s.v. strait a. 3 b. The latter use is a misinterpretation
of Matt. vii. 14 _Because strait is the gate, and narrow is the way which
leadeth vnto life, and few there be that finde it.'
¿ 18.07.99 V