(law) The most severe level of felony, typically involving planning or other aggravating factors.

The family of the President of the United States. / (by extension) The immediate family of a political chief executive.

(anthropology) The first meeting between people of two previously unknown cultures. / (science fiction) The first meeting between humans and extraterrestrials.

The time when light first appears in the morning; dawn, especially the start of dawn. / (astronomy) The first use of a telescope or other instrument to capture an astronomical image.

Alternative spelling of first footing

Superficially, without a full inspection.

(rare, possibly nonstandard) First, especially first place in a competition.

Someone who can administer first aid

(idiomatic) Being the first occurrence of an event that is scheduled or hoped to become annual.

Alternative form of headfirst