Exactness

[ig-zakt] /ɪgˈzækt/

adjective
1.
strictly accurate or correct:
an exact likeness; an exact description.
2.
precise, as opposed to approximate:
the exact sum; the exact date.
3.
admitting of no deviation, as laws or discipline; strict or rigorous.
4.
capable of the greatest precision:
exact instruments.
5.
characterized by or using strict accuracy:
an exact thinker.
6.
Mathematics. (of a differential equation) noting that the collection of all terms, equated to zero, is an .
verb (used with object)
7.
to call for, demand, or require:
to exact respect from one’s children.
8.
to force or compel the payment, yielding, or performance of:
to exact money; to exact tribute from a conquered people.
/ɪɡˈzækt/
adjective
1.
correct in every detail; strictly accurate: an exact copy
2.
precise, as opposed to approximate; neither more nor less: the exact sum
3.
(prenominal) specific; particular: this exact spot
4.
operating with very great precision: exact instruments
5.
allowing no deviation from a standard; rigorous; strict: an exact mind
6.
based mainly on measurement and the formulation of laws, as opposed to description and classification: physics is an exact science
verb (transitive)
7.
to force or compel (payment or performance); extort: to exact tribute
8.
to demand as a right; insist upon: to exact respect from one’s employees
9.
to call for or require: this work exacts careful effort
n.

1560s, “perfection,” from exact (adj.) + -ness. Meaning “precision” is 1640s.
adj.

“precise, rigorous, accurate,” 1530s, from Latin exactus “precise, accurate, exact,” past participle of exigere “demand, require,” literally “to drive or force out,” also “demand, finish, measure,” from ex- “out” (see ex-) + agere “drive, lead, act” (see act).
v.

mid-15c., from Latin exactus, past participle of exigere (see exact (adj.)). Older in English than the adjective and retaining the literal sense of the Latin source. Related: Exacted; exacting.