As adjectives the difference between forthcoming and undefined

is that forthcoming is (not comparable) approaching or about to take place while undefined is lacking a definition or value.

As a noun forthcoming

is something that is yet to come.

As a noun seater

is (in combination) a vehicle or item of furniture that has a specified seating capacity.

As an adjective undefined is

lacking a definition or value.

As a verb appeal

is (obsolete) to accuse (someone of something).

As a noun appeal

is (legal) (a) an application for the removal of a cause or suit from an inferior to a superior judge or court for re-examination or review (b) the mode of proceeding by which such removal is effected (c) the right of appeal (d) an accusation; a process which formerly might be instituted by one private person against another for some heinous crime demanding punishment for the particular injury suffered, rather than for the offense against the public (e) an accusation of a felon at common law by one of his accomplices, which accomplice was then called an approver.

As an adjective undefined is

lacking a definition or value.

As a verb interrupt

is to disturb or halt an ongoing process or action by interfering suddenly.

As a noun interrupt

is (computing) an event that causes a computer to temporarily cease what it was doing and attend to a condition.

As an adjective undefined is

lacking a definition or value.

As a verb compile

is .

As an adjective undefined is

lacking a definition or value.

As a verb contend

is to strive in opposition; to contest; to dispute; to vie; to quarrel; to fight.

As an adjective undefined is

lacking a definition or value.

As a noun childrearing

is the raising of children; parenting.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between steep and undefined

is that steep is of a near-vertical gradient; of a slope, surface, curve, etc that proceeds upward at an angle near vertical while undefined is lacking a definition or value.

As a verb steep

is (ambitransitive) to soak an item (or to be soaked) in liquid in order to gradually add or remove components to or from the item.

As a noun steep

is a liquid used in a steeping process.

As a noun condition

is a logical clause or phrase that a conditional statement uses the phrase can either be true or false.

As a verb condition

is to subject to the process of acclimation.

As an adjective undefined is

lacking a definition or value.

As an initialism aim

is aol instant messenger.

As an adjective undefined is

lacking a definition or value.