Dictionary Definition

acceptable adj

1 worthy of acceptance or satisfactory; "acceptable levels of radiation"; "performances varied from acceptable to excellent" [ant: unacceptable]

2 judged to be in conformity with approved usage; "acceptable English usage" [syn: accepted]

3 meeting requirements; "the step makes a satisfactory seat" [syn: satisfactory]

4 adequate for the purpose; "the water was acceptable for drinking"

User Contributed Dictionary

Derivative of accept + -able

Capable, worthy, or sure of being accepted or received with pleasure; pleasing to a receiver; gratifying; agreeable; welcome; as, an acceptable present, one acceptable to us.
Barely worthy, less than excellent; passable.

capable, worthy or sure of being accepted

Proper may refer to:

Proper (liturgy), the part of a Christian liturgy that is specific to the date within the Liturgical Year
Proper frame, such system of reference in which object is stationary (non moving), sometimes also called a co-moving frame
Proper, in heraldry, means depicted in natural colors
Proper or appropriate conduct

In mathematics:

Proper map, in topology , a property of continuous function between topological spaces, if inverse images of compact subsets are compact
Proper morphism, in algebraic geometry, an analogue of a proper map for algebraic varieties
Proper transfer function, a transfer function in control theory in which the degree of the numerator does not exceed the degree of the denominator
It is also used to indicate a subspace or a subset is strictly smaller than its parent—see "strict"