apologize-v; 2 Senses

Sense Number 1: State one's contrition, possibly admitting shortcomings or failings, to someone else.

Examples:
He apologized for his wrongdoing.
I apologize for being late.
Catherine, I apologize.

Mappings:
VerbNet: NP
FrameNet: NP
PropBank: apologize.01
WordNet 3.0 Sense Numbers: 1

Sense Number 2: Defend through reasoning or statements of belief; usually applied to a doctrine.

Examples:
Those who apologize for Christianity tend to offer one of several arguments.

Mappings:
VerbNet: NP
FrameNet: NP
PropBank: NM
WordNet 3.0 Sense Numbers: 2