ra‧zor /ˈreɪzə $ -ər/ noun
[Date: 1200-1300; Language: Old French; Origin: raseor, from raser; ⇒ raze]

1. [countable] a tool with a sharp blade, used to remove hair from your skin ⇒ shaver:
an electric razor
a disposable razor

2. be on a razor/razor’s edge British English to be in a difficult position where a mistake could be dangerous:
Politically we are on a razor edge.

[TahlilGaran] Dictionary of Contemporary English ▲

razor
noun
ADJ. open | blunt | cut-throat, disposable, electric, safety
VERB + RAZOR cut sb/sth with, shave with, slash sb/sth with, use We used a razor to cut the string.
be armed with He was armed with a cut-throat razor.
RAZOR + NOUN blade | wire
PREP. with a/the ~ He slashed his wrists with a razor.

[TahlilGaran] Collocations Dictionary ▲