0 a phrase in which an adverb or other word is put between "to" and an infinitive. Some people consider split infinitives to be bad grammar, but they are becoming generally acceptable:
"To boldly go" is an example of a split infinitive.
Yankovic noted that he deliberately added a split infinitive in the lyrics to see if listeners would notice it.
Is my split infinitive of a few lines ago any less (or more) intelligible, or ambiguous, than the alternatives?
One split infinitive, one whack.
He suggested that there might be complaints about a split infinitive, or pedantry of that sort.
Is it not wrong to "adequately express "oneself with a split infinitive?
He provided a classic description of the split infinitive, which can be applied to the rate support grant system.
That is the authors' split infinitive, not mine.
The term "compound split infinitive" is not found in these dictionaries and appears to be very recent.